SAR Report

FCC ID: Q9SAWRD7500

RF Exposure Info

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FCCID_4370139

SAR EVALUATION REPORT For Northfield Telecommunications, Inc. d/b/a Advanced Wireless Communications 20809 Kensington Blvd, Lakeville, MN 55044, United States FCC ID: Q9SAWRD7500 Report Type: Product Type: Original Report Two way radio Report Number: RDG190320007-20A Report Date: 2019-05-15 Rocky Xiao Reviewed By: RF Engineer Prepared By: Bay Area Compliance Laboratories Corp. (Dongguan) No.69 Pulongcun, Puxinhu Industry Area, Tangxia, Dongguan, Guangdong, China Tel: +86-769-86858888 Fax: +86-769-86858891 www.baclcorp.com.cn Note: This test report is prepared for the customer shown above and for the device described herein. It may not be duplicated or used in part without prior written consent from Bay Area Compliance Laboratories Corp. (Dongguan). This report must not be used by the customer to claim product certification, approval, or endorsement by A2LA* or any agency of the Federal Government. * This report may contain data that are not covered by the A2LA accreditation and are marked with an asterisk “*”.

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A Attestation of Test Results EUT Description Two way radio EUT Tested Model AWR-D7500 Information Serial Number 19032000721 Test Date 2019-03-22 ~ 2019-03-24 Test Mode Max. SAR Level(s) Reported(W/kg) Limit 1g Head SAR(Face Up) 4.91 PTT(400-470 MHz) 8.0 (W/kg) 1g Body SAR(Body Back) 5.87 FCC 47 CFR part 2.1093 Radiofrequency radiation exposure evaluation: portable devices IEEE1528:2013 IEEE Recommended Practice for Determining the Peak Spatial-Average Specific Absorption Rate (SAR) in the Human Head from Wireless Communications Devices: Measurement Techniques IEC 62209-2:2010 Applicable Human exposure to radio frequency fields from hand-held and body-mounted wireless Standards communication devices-Human models, instrumentation, and procedures-Part 2: Procedure to determine the specific absorption rate (SAR) for wireless communication devices used in close proximity to the human body (frequency range of 30 MHz to 6 GHz) KDB procedures KDB 447498 D01 General RF Exposure Guidance v06 KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz v01r04 KDB 865664 D02 RF Exposure Reporting v01r02 KDB 643646 D01 SAR Test for PTT Radios v01r03 Note: This wireless device has been shown to be capable of compliance for localized specific absorption rate (SAR) for Occupational/Controlled Exposure limits specified in FCC 47 CFR part 2.1093 and has been tested in accordance with the measurement procedures specified in IEEE 1528-2013 and RF exposure KDB procedures. The results and statements contained in this report pertain only to the device(s) evaluated. SAR Evaluation Report 2 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A TABLE OF CONTENTS DOCUMENT REVISION HISTORY ......................................................................................................................... 4 EUT DESCRIPTION .................................................................................................................................................... 5 TECHNICAL SPECIFICATION ......................................................................................................................................... 5 REFERENCE, STANDARDS, AND GUIDELINES.................................................................................................. 6 SAR LIMITS ................................................................................................................................................................. 6 FACILITIES .................................................................................................................................................................. 7 DESCRIPTION OF TEST SYSTEM .......................................................................................................................... 8 EQUIPMENT LIST AND CALIBRATION ............................................................................................................. 12 EQUIPMENTS LIST & CALIBRATION INFORMATION .................................................................................................... 12 SAR MEASUREMENT SYSTEM VERIFICATION .............................................................................................. 13 LIQUID VERIFICATION ............................................................................................................................................... 13 SYSTEM ACCURACY VERIFICATION ........................................................................................................................... 14 SAR SYSTEM VALIDATION DATA ..................................................................................................................... 15 EUT TEST STRATEGY AND METHODOLOGY ................................................................................................. 17 TEST POSITIONS FOR DEVICE OPERATING NEXT TO A PERSON’S EAR........................................................................ 17 CHEEK/TOUCH POSITION ........................................................................................................................................... 18 EAR/TILT POSITION ................................................................................................................................................... 18 TEST POSITIONS FOR BODY-WORN AND OTHER CONFIGURATIONS .............................................................................. 19 TEST DISTANCE FOR SAR EVALUATION .................................................................................................................... 19 SAR EVALUATION PROCEDURE ................................................................................................................................. 20 CONDUCTED OUTPUT POWER MEASUREMENT ........................................................................................... 21 PROVISION APPLICABLE ............................................................................................................................................ 21 TEST PROCEDURE ...................................................................................................................................................... 21 MAXIMUM TARGET OUTPUT POWER ......................................................................................................................... 21 TEST RESULTS: .......................................................................................................................................................... 21 SAR MEASUREMENT RESULTS ........................................................................................................................... 22 SAR MEASUREMENT VARIABILITY .................................................................................................................. 24 SAR PLOTS ................................................................................................................................................................. 25 APPENDIX A MEASUREMENT UNCERTAINTY ............................................................................................... 26 APPENDIX B EUT TEST POSITION PHOTOS .................................................................................................... 28 APPENDIX C CALIBRATION CERTIFICATES .................................................................................................. 29 SAR Evaluation Report 3 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A DOCUMENT REVISION HISTORY Revision Number Report Number Description of Revision Date of Revision 1.0 RDG190320007-20A Original Report 2019-05-15 SAR Evaluation Report 4 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A EUT DESCRIPTION The Northfield Telecommunications, Inc. d/b/a Advanced Wireless Communications’s product, model number: AWR-D7500(FCC ID: Q9SAWRD7500) in this report was a Two way radio. *All measurement and test data in this report was gathered from production sample serial number: 19032000721 .The EUT supplied by the applicant was received on 2019-03-20. Technical Specification Device Type: Portable Exposure Category: Occupational/Controlled Exposure Antenna Type(s): External Antenna Body-Worn Accessories: Belt Clip Face-Head Accessories: None Operation Mode PTT_FM, PTT_4FSK Frequency Band: PTT: 400-470 MHz Conducted RF Power: 4.77 (W) Power Source: 7.4 VDC Rechargeable Battery Normal Operation: Face Up and Body-worn SAR Evaluation Report 5 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A REFERENCE, STANDARDS, AND GUIDELINES The Report and Order requires routine SAR evaluation prior to equipment authorization of portable transmitter devices, including portable telephones. For consumer products, ANSI/IEEE standard C95.1-1992 [6], limit the whole-body-averaged SAR to 0.4 and 0.08 W/kg for the controlled and uncontrolled environments. According to the Supplement C of OET Bulletin 65 “Evaluating Compliance with FCC Guide-lines for Human Exposure to Radio frequency Electromagnetic Fields", released on Jun 29, 2001 by the FCC, the device should be evaluated at maximum output power (radiated from the antenna) under “worst-case” conditions for normal or intended use, incorporating normal antenna operating positions, device peak performance frequencies and positions for maximum RF energy coupling. This report describes the methodology and results of experiments performed on wireless data terminal. The objective was to determine if there is RF radiation and if radiation is found, what is the extent of radiation with respect to safety limits. SAR (Specific Absorption Rate) is the measure of RF exposure determined by the amount of RF energy absorbed by human body (or its parts) – to determine how the RF energy couples to the body or head which is a primary health concern for body worn devices. The limit below which the exposure to RF is considered safe by regulatory bodies in North America. SAR Limits FCC/IC Limit SAR (W/kg) (General Population / (Occupational / EXPOSURE LIMITS Uncontrolled Exposure Controlled Exposure Environment) Environment) Spatial Average 0.08 0.4 (averaged over the whole body) Spatial Peak 1.60 8.0 (averaged over any 1 g of tissue) Spatial Peak (hands/wrists/feet/ankles 4.0 20.0 averaged over 10 g) Population/Uncontrolled Environments are defined as locations where there is the exposure of individual who have no knowledge or control of their exposure. Occupational/Controlled Environments are defined as locations where there is exposure that may be incurred by people who are aware of the potential for exposure (i.e. as a result of employment or occupation). SAR Evaluation Report 6 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A FACILITIES The Test site used by Bay Area Compliance Laboratories Corp. (Dongguan) to collect test data is located on the No.69 Pulongcun, Puxinhu Industry Area, Tangxia, Dongguan, Guangdong, China. The test site has been approved by the FCC under the KDB 974614 D01 and is listed in the FCC Public Access Link (PAL) database, FCC Registration No. : 897218,the FCC Designation No. : CN1220. The lab has been recognized by Innovation, Science and Economic Development Canada to test to Canadian radio equipment requirements, the CAB identifier : CN0022. The test sites and measurement facilities used to collect data are located at: SAR Lab 1 SAR Lab 2 SAR Evaluation Report 7 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A DESCRIPTION OF TEST SYSTEM These measurements were performed with the automated near-field scanning system DASY5 from Schmid & Partner Engineering AG (SPEAG) which is the Fifth generation of the system shown in the figure hereinafter: DASY5 System Description The DASY5 system for performing compliance tests consists of the following items: SAR Evaluation Report 8 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A  A standard high precision 6-axis robot with controller, teach pendant and software. An arm extension for accommodating the data acquisition electronics (DAE).  An isotropic field probe optimized and calibrated for the targeted measurement.  A data acquisition electronics (DAE) which performs the signal application, signal multiplexing, AD-conversion, offset measurements, mechanical surface detection, collision detection, etc. The unit is battery powered with standard or rechargeable batteries. The signal is optically transmitted to the EOC.  The Electro-optical converter (EOC) performs the conversion from optical to electrical signals for the digital communication to the DAE. To use optical surface detection, a special version of the EOC is required. The EOC signal is transmitted to the measurement server.  The function of the measurement server is to perform the time critical tasks such as signal filtering, control of the robot operation and fast movement interrupts.  The Light Beam used is for probe alignment. This improves the (absolute) accuracy of the probe positioning.  A computer running Win7 professional operating system and the DASY52 software.  Remote control and teach pendant as well as additional circuitry for robot safety such as warning lamps, etc.  The phantom, the device holder and other accessories according to the targeted measurement. DASY5 Measurement Server The DASY5 measurement server is based on a PC/104 CPU board with a 400MHz Intel ULV Celeron, 128MB chip-disk and 128MB RAM. The necessary circuits for communication with the DAE4 (or DAE3) electronics box, as well as the 16 bit AD-converter system for optical detection and digital I/O interface are contained on the DASY5 I/O board, which is directly connected to the PC/104 bus of the CPU board. The measurement server performs all real-time data evaluation of field measurements and surface detection, controls robot movements and handles safety operation. The PC operating system cannot interfere with these time critical processes. All connections are supervised by a watchdog, and disconnection of any of the cables to the measurement server will automatically disarm the robot and disable all program-controlled robot movements. Furthermore, the measurement server is equipped with an expansion port which is reserved for future applications. Please note that this expansion port does not have a standardized point out, and therefore only devices provided by SPEAG can be connected. Devices from any other supplier could seriously damage the measurement server. Data Acquisition Electronics The data acquisition electronics (DAE4) consist of a highly sensitive electrometer-grade preamplifier with auto-zeroing, a channel and gain-switching multiplexer, a fast 16 bit AD-converter and a command decoder with a control logic unit. Transmission to the measurement server is accomplished through an optical downlink for data and status information, as well as an optical uplink for commands and the clock. The mechanical probe mounting device includes two different sensor systems for frontal and sideways probe contacts. They are used for mechanical surface detection and probe collision detection. The input impedance of both the DAE4 as well as of the DAE3 box is 200MOhm; the inputs are symmetrical and floating. Common mode rejection is above 80 dB. SAR Evaluation Report 9 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A ES3DV2 E-Field Probes Frequency 10 MHz to > 4 GHz Linearity: ± 0.2 dB (30 MHz to 4 GHz) Directivity ± 0.2 dB in TSL (rotation around probe axis) ± 0.3 dB in TSL (rotation normal to probe axis) Dynamic Range 5 µW/g to > 100 mW/g Linearity: ± 0.2 dB (noise: typically < 1 µW/g) Dimensions Overall length: 337 mm (Tip: 10 mm) Tip diameter: 4 mm (Body: 10 mm) Typical distance from probe tip to dipole centers: 4.0 mm Application General dosimetry up to 4 GHz Dosimetry in strong gradient fields Compliance tests of mobile phones Compatibility DASY3, DASY4, DASY52 SAR and higher, EASY4/MRI Robots The DASY5 system uses the high precision industrial robot. The robot offers the same features important for our application:  High precision (repeatability 0.02mm)  High reliability (industrial design)  Low maintenance costs (virtually maintenance free due to direct drive gears; no belt drives)  Jerk-free straight movements (brushless synchrony motors; no stepper motors)  Low ELF interference (motor control fields shielded via the closed metallic construction shields) The above mentioned robots are controlled by the Staubli CS8c robot controllers. All information regarding the use and maintenance of the robot arm and the robot controller is contained on the CDs delivered along with the robot. Paper manuals are available upon request direct from Staubli. Area Scans Area scans are defined prior to the measurement process being executed with a user defined variable spacing between each measurement point (integral) allowing low uncertainty measurements to be conducted. Scans defined for FCC applications utilize a 15mm 2 step integral, with 1.5mm interpolation used to locate the peak SAR area used for zoom scan assessments. Where the system identifies multiple SAR peaks (which are within 25% of peak value) the system will provide the user with the option of assessing each peak location individually for zoom scan averaging. Zoom Scan (Cube Scan Averaging) The averaging zoom scan volume utilized in the DASY5 software is in the shape of a cube and the side dimension of a 1 g or 10 g mass is dependent on the density of the liquid representing the simulated tissue. A density of 1000 kg/m3 is used to represent the head and body tissue density and not the phantom liquid density, in order to be consistent with the definition of the liquid dielectric properties, i.e. the side length of the 1g cube is 10mm,with the side length of the 10g cube is 21.5mm. When the cube intersects with the surface of the phantom, it is oriented so that 3 vertices touch the surface of the shell or the center of a face is tangent to the surface. The face of the cube closest to the surface is modified in order to conform to the tangent surface. SAR Evaluation Report 10 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A The zoom scan integer steps can be user defined so as to reduce uncertainty, but normal practice for typical test applications (including FCC) utilize a physical step of 7 x7 x 7 (5mmx5mmx5mm) providing a volume of 30 mm in the X & Y & Z axis. Tissue Dielectric Parameters for Head and Body Phantoms The head tissue dielectric parameters recommended by the IEEE SCC-34/SC-2 in P1528 have been incorporated in the following table. These head parameters are derived from planar layer models simulating the highest expected SAR for the dielectric properties and tissue thickness variations in a human head. Other head and body tissue parameters that have not been specified in P1528 are derived from the tissue dielectric parameters computed from the 4-Cole-Cole equations described in Reference [12] and extrapolated according to the head parameters specified in P1528. Recommended Tissue Dielectric Parameters for Head and Body Frequency Head Tissue Body Tissue (MHz) εr Ơ (S/m) εr Ơ (S/m) 150 52.3 0.76 61.9 0.80 300 45.3 0.87 58.2 0.92 450 43.5 0.87 56.7 0.94 835 41.5 0.90 55.2 0.97 900 41.5 0.97 55.0 1.05 915 41.5 0.98 55.0 1.06 1450 40.5 1.20 54.0 1.30 1610 40.3 1.29 53.8 1.40 1800-2000 40.0 1.40 53.3 1.52 2450 39.2 1.80 52.7 1.95 3000 38.5 2.40 52.0 2.73 5800 35.3 5.27 48.2 6.00 SAR Evaluation Report 11 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A EQUIPMENT LIST AND CALIBRATION Equipments List & Calibration Information Calibration Calibration Equipment Model S/N Date Due Date DASY5 Test Software DASY52.8 N/A NCR NCR DASY5 Measurement Server DASY5 4.5.12 1470 NCR NCR Data Acquisition Electronics DAE3 471 2018/12/3 2019/12/3 E-Field Probe ES3DV2 3019 2018/8/20 2019/8/20 Dipole, 450MHz D450V3 1096 2016/11/7 2019/11/6 Mounting Device MD4HHTV5 SD 000 H01 KA NCR NCR Oval Flat Phantom ELI V8.0 2051 NCR NCR Simulated Tissue 450 MHz Head TS-450-H 1709045001 Each Time / Simulated Tissue 450 MHz Body TS-450-B 1709045002 Each Time / Network Analyzer 8753C 3033A02857 2018/8/3 2019/8/3 Dielectric assessment kit 1253 SM DAK 040 CA NCR NCR Signal Generator 8665B 3438a00584 2018/7/19 2019/7/19 Power Meter E4419B MY45103907 2018/4/11 2019/4/11 Power Amplifier ZVA-213-S+ SN054 201245 NCR NCR Directional Coupler 53dB 488Z NCR NCR Attenuator 20dB, 100W LN749 NCR NCR Attenuator 6dB, 150W 2754 NCR NCR SAR Evaluation Report 12 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A SAR MEASUREMENT SYSTEM VERIFICATION Liquid Verification Liquid Verification Setup Block Diagram Liquid Verification Results Liquid Delta Target Value Frequency Parameter (%) Tolerance Liquid Type (MHz) Ơ Ơ ΔƠ (%) εr εr Δεr (S/m) (S/m) (S/m) 400.0125 Simulated Tissue 450 MHz Head 44.705 0.852 44.1 0.87 1.37 -2.07 ±5 417.5125 Simulated Tissue 450 MHz Head 44.563 0.861 43.89 0.87 1.53 -1.03 ±5 435.0125 Simulated Tissue 450 MHz Head 44.421 0.871 43.68 0.87 1.7 0.11 ±5 450 Simulated Tissue 450 MHz Head 44.313 0.878 43.5 0.87 1.87 0.92 ±5 452.4875 Simulated Tissue 450 MHz Head 44.28 0.881 43.49 0.87 1.82 1.26 ±5 469.9875 Simulated Tissue 450 MHz Head 44.138 0.889 43.4 0.87 1.7 2.18 ±5 *Liquid Verification above was performed on 2019/3/24. Liquid Delta Target Value Frequency Parameter (%) Tolerance Liquid Type (MHz) Ơ Ơ ΔƠ (%) εr εr Δεr (S/m) (S/m) (S/m) 400.0125 Simulated Tissue 450 MHz Body 57.943 0.912 57.2 0.93 1.3 -1.94 ±5 417.5125 Simulated Tissue 450 MHz Body 57.847 0.918 57.02 0.94 1.45 -2.34 ±5 435.0125 Simulated Tissue 450 MHz Body 57.752 0.925 56.85 0.94 1.59 -1.6 ±5 450 Simulated Tissue 450 MHz Body 57.671 0.929 56.7 0.94 1.71 -1.17 ±5 452.4875 Simulated Tissue 450 MHz Body 57.657 0.931 56.69 0.94 1.71 -0.96 ±5 469.9875 Simulated Tissue 450 MHz Body 57.561 0.937 56.62 0.94 1.66 -0.32 ±5 *Liquid Verification above was performed on 2019/3/22. SAR Evaluation Report 13 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A System Accuracy Verification Prior to the assessment, the system validation kit was used to test whether the system was operating within its specifications of ±10%. The validation results are tabulated below. And also the corresponding SAR plot is attached as well in the SAR plots files. The spacing distance s in the System Verification Setup Block Diagram is given by the following: a) s = 15 mm ± 0,2 mm for 300 MHz ≤ f ≤ 1 000 MHz; b) s = 10 mm ± 0,2 mm for 1 000 MHz < f ≤ 3 000 MHz; c) s = 10 mm ± 0,2 mm for 3 000 MHz < f ≤ 6 000 MHz. d) s = 0 mm for f = 150 MHz(Loop Antenna). System Verification Setup Block Diagram System Accuracy Check Results Input Measured Normalized Target Frequency Delta Tolerance Date Liquid Type Power SAR to 1W Value Band (%) (%) (mW) (W/kg) (W/kg) (W/kg) 2019/3/24 450 MHz 450MHz Head 100 1g 0.437 4.37 4.53 -3.53 ±10 2019/3/22 450 MHz 450MHz Body 100 1g 0.446 4.46 4.55 -1.98 ±10 *The SAR values above are normalized to 1 Watt forward power. SAR Evaluation Report 14 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007—20A. SAR SYSTEM VALIDA TION DA TA System Performance 450 MHz Head DUT: Dipole 450 MHz; Type: D4S0V3; Serial: 1096 Communication System: CW; Frequency: 450 MHz;Duty Cycle: 1:1 Medium parameters used: £=450 MHz; 0 =0.878 $/m; &, = 44.313; p = 1000 kg/m‘ Phantom section: Flat Section DASYS Configuration: * Probe: ESSDV2 — SN3019; ConvBF(7.18, 7.18, 7.18); Calibrated: 2018/8/20; * Sensor—Surface: Amm (Mechanical Surface Detection) * Electronics: DAE3 Snd71; Calibrated: 2018/12/3 * Phantom: ELI v.0; Type: QDOVAOO4AA; Serial: 2051 * Measurement SWDASY52, Version 52.8 (8); Area Sean (41x201x1): Interpolated grid: d=1.500 mm, dy=1.500 mm Maximum value of SAR (interpolated) = 0.456 W/kg Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=Smm, dy=Smm, de=Smm Reference Value = 22.74 V/m; Power Drift =—0.03 dB Peak SAR (extrapolated) =0.662 Wikg SAR(L 3 = 0.437 We SAR(IO g = 0297 Whke Maximum value of SAR (measured) =0.464 Wikg —1.79 —3.58 —5.36 —7.15 —8.94 0 dB =0.464 Wikg =—3.33 dBWikg SAR Evaluation Report 15 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007—20A. System Performance 450 MHz Body DUT: Dipole 450 MHz:; Type: D450V3; Serial: 1096 Communication System: CW; Frequency: 450 MHz;Duty Cycle: 1:1 Medium parameters used: £=450 MHz; 0=0.929 $/m; &, =57.671; p = 1000 kg/m? Phantom section: Flat Section DASYS Configuration: * Probe: ESSDV2 — SN3019; ConvF(Z.1,7.1,7.1); Calibrated: 2018/820; * Sensor—Surface: Amm (Mechanical Surface Detection) * Electronics DAE3 Snd71; Calibrated: 2018/12/3 * Phantom: ELI v8.0; Type: QDOVAOO4AA; Serial: 2051 * Measurement SWDASY52, Version 52.8 (8); Area Sean (41x201x1): Interpolated grid: d=1.500 mm, dy=1.500 mm Maximum value of SAR (interpolated) = 0.477 W/kg Zoom Scan (7x7x7)/Cube 0: Measurement grid: dx=Smm, dy=Smm, de=Smm Reference Value =23.12 V/m; Power Drift =—0.14 dB Peak SAR (extrapolated) =0.674 Wikg SAR(L 3 = 0.446 Wikg SAR(IO g) = 0.303 Whkg Maximum value of SAR (measured) = 0.480 W/kg —1.95 3.91 —5.06 ~7.02 9.77 0 dB =0.480 Wikg=3.19 dBWikg SAR Evaluation Report 16 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A EUT TEST STRATEGY AND METHODOLOGY Test Positions for Device Operating Next to a Person’s Ear This category includes most wireless handsets with fixed, retractable or internal antennas located toward the top half of the device, with or without a foldout, sliding or similar keypad cover. The handset should have its earpiece located within the upper ¼ of the device, either along the centerline or off-centered, as perceived by its users. This type of handset should be positioned in a normal operating position with the “test device reference point” located along the “vertical centerline” on the front of the device aligned to the “ear reference point”. The “test device reference point” should be located at the same level as the center of the earpiece region. The “vertical centerline” should bisect the front surface of the handset at its top and bottom edges. A “ear reference point” is located on the outer surface of the head phantom on each ear spacer. It is located 1.5 cm above the center of the ear canal entrance in the “phantom reference plane” defined by the three lines joining the center of each “ear reference point” (left and right) and the tip of the mouth. A handset should be initially positioned with the earpiece region pressed against the ear spacer of a head phantom. For the SCC-34/SC-2 head phantom, the device should be positioned parallel to the “N-F” line defined along the base of the ear spacer that contains the “ear reference point”. For interim head phantoms, the device should be positioned parallel to the cheek for maximum RF energy coupling. The “test device reference point” is aligned to the “ear reference point” on the head phantom and the “vertical centerline” is aligned to the “phantom reference plane”. This is called the “initial ear position”. While maintaining these three alignments, the body of the handset is gradually adjusted to each of the following positions for evaluating SAR: F LE ER P B 15 M mm N EE P ERP - ear reference i t- entrance to ear EEP l SAR Evaluation Report 17 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A Cheek/Touch Position The device is brought toward the mouth of the head phantom by pivoting against the “ear reference point” or along the “N-F” line for the SCC-34/SC-2 head phantom. This test position is established: When any point on the display, keypad or mouthpiece portions of the handset is in contact with the phantom. (or) When any portion of a foldout, sliding or similar keypad cover opened to its intended self-adjusting normal use position is in contact with the cheek or mouth of the phantom. For existing head phantoms – when the handset loses contact with the phantom at the pivoting point, rotation should continue until the device touches the cheek of the phantom or breaks its last contact from the ear spacer. Cheek /Touch Position Ear/Tilt Position With the handset aligned in the “Cheek/Touch Position”: 1) If the earpiece of the handset is not in full contact with the phantom’s ear spacer (in the “Cheek/Touch position”) and the peak SAR location for the “Cheek/Touch” position is located at the ear spacer region or corresponds to the earpiece region of the handset, the device should be returned to the “initial ear position” by rotating it away from the mouth until the earpiece is in full contact with the ear spacer. 2) (otherwise) The handset should be moved (translated) away from the cheek perpendicular to the line passes through both “ear reference points” (note: one of these ear reference points may not physically exist on a split head model) for approximate 2-3 cm. While it is in this position, the device handset is tilted away from the mouth with respect to the “test device reference point” until the inside angle between the vertical centerline on the front surface of the phone and the horizontal line passing through the ear reference point is by 15 80°. After the tilt, it is then moved (translated) back toward the head perpendicular to the line passes through both “ear reference points” until the device touches the phantom or the ear spacer. If the antenna touches the head first, the positioning process should be repeated with a tilt angle less than 15° so that the device and its antenna would touch the phantom simultaneously. This test position may require a device holder or positioner to achieve the translation and tilting with acceptable positioning repeatability. If a device is also designed to transmit with its keypad cover closed for operating in the head position, such positions should also be considered in the SAR evaluation. The device should be tested on the left and right side of the head phantom in the “Cheek/Touch” and “Ear/Tilt” positions. When applicable, each configuration should be tested with the antenna in its fully extended and fully retracted positions. These test configurations should be tested at the high, middle and low frequency channels of each operating mode; for example, AMPS, CDMA, and TDMA. If the SAR measured at the middle channel for each test configuration (left, right, Cheek/Touch, Tilt/Ear, extended and retracted) is at least 2.0 dB lower than the SAR limit, testing at the high and low channels is optional for such test configuration(s). If the transmission band of the test device is less than 10 MHz, testing at the high and low frequency channels is optional. SAR Evaluation Report 18 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A Ear /Tilt 15o Position Test positions for body-worn and other configurations Body-worn operating configurations should be tested with the belt-clips and holsters attached to the device and positioned against a flat phantom in normal use configurations. Devices with a headset output should be tested with a headset connected to the device. When multiple accessories that do not contain metallic components are supplied with the device, the device may be tested with only the accessory that dictates the closest spacing to the body. When multiple accessories that contain metallic components are supplied with the device, the device must be tested with each accessory that contains a unique metallic component. If multiple accessories share an identical metallic component (e.g., the same metallic belt-clip used with different holsters with no other metallic components), only the accessory that dictates the closest spacing to the body must be tested. Body-worn accessories may not always be supplied or available as options for some devices that are intended to be authorized for body-worn use. A separation distance of 1.5 cm between the back of the device and a flat phantom is recommended for testing body-worn SAR compliance under such circumstances. Other separation distances may be used, but they should not exceed 2.5 cm. In these cases, the device may use body-worn accessories that provide a separation distance greater than that tested for the device provided however that the accessory contains no metallic components. Test Distance for SAR Evaluation In this case the DUT(Device Under Test) is set directly against the phantom, the test distance is 0mm for Body Back mode; for Face Up mode the distance is 25mm. SAR Evaluation Report 19 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A SAR Evaluation Procedure The evaluation was performed with the following procedure: Step 1: Measurement of the SAR value at a fixed location above the ear point or central position was used as a reference value for assessing the power drop. The SAR at this point is measured at the start of the test and then again at the end of the testing. Step 2: The SAR distribution at the exposed side of the head was measured at a distance of 4 mm from the inner surface of the shell. The area covered the entire dimension of the head or radiating structures of the EUT, the horizontal grid spacing was 15 mm x 15 mm, and the SAR distribution was determined by integrated grid of 1.5mm x 1.5mm. Based on these data, the area of the maximum absorption was determined by spline interpolation. The first Area Scan covers the entire dimension of the EUT to ensure that the hotspot was correctly identified. Step 3: Around this point, a volume of 30 mm x 30 mm x 30 mm was assessed by measuring 7x 7 x 7 points. On the basis of this data set, the spatial peak SAR value was evaluated under the following procedure: 1) The data at the surface were extrapolated, since the center of the dipoles is 1.2 mm away from the tip of the probe and the distance between the surface and the lowest measuring point is 1.3 mm. The extrapolation was based on a least square algorithm. A polynomial of the fourth order was calculated through the points in z-axes. This polynomial was then used to evaluate the points between the surface and the probe tip. 2) The maximum interpolated value was searched with a straightforward algorithm. Around this maximum the SAR values averaged over the spatial volumes (1 g or 10 g) were computed by the 3D-Spline interpolation algorithm. The 3D-Spline is composed of three one dimensional splines with the “Not a knot"-condition (in x, y and z-directions). The volume was integrated with the trapezoidal-algorithm. One thousand points (10 x 10 x 10) were interpolated to calculate the averages. All neighboring volumes were evaluated until no neighboring volume with a higher average value was found. Step 4: Re-measurement of the SAR value at the same location as in Step 1. If the value changed by more than 5%, the evaluation was repeated. SAR Evaluation Report 20 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A CONDUCTED OUTPUT POWER MEASUREMENT Provision Applicable The measured peak output power should be greater and within 5% than EMI measurement. Test Procedure The RF output of the transmitter was connected to the input of the EMI Test Receiver through sufficient attenuation. EUT Attenuator EMI Test (20dB) Receiver The EMI Test Receiver setting: RBW VBW 100 kHz 300 kHz Maximum Target Output Power Maximum Output Power Mode with tolerence PTT FM_12.5kHz 5.0 (W) (400-470 MHz) 4FSK_12.5kHz 5.0 (W) Test Results: Frequency Output Power Band/Test Mode (MHz) Power(W) level 400.0125 4.58 High 417.5125 4.47 High FM 435.0125 4.77 High 12.5 kHz 452.4875 4.54 High PTT 469.9875 4.72 High (400-470 MHz) 400.0125 4.63 High 417.5125 4.70 High 4FSK 435.0125 4.66 High 12.5 kHz 452.4875 4.53 High 469.9875 4.58 High SAR Evaluation Report 21 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A SAR MEASUREMENT RESULTS Environmental Conditions Temperature: 21.4-23.0 ℃ 22.6-23.8 ℃ Relative Humidity: 45% 48% ATM Pressure: 100.4 kPa 101.8 kPa Test Date: 2019/3/22 2019/3/24 Testing was performed by Steve Zhou, Brave Lu, Harvey Lei. SAR Evaluation Report 22 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A Test Result: (PTT(400-470 MHz)): Pre-Scan all 5 Channels, the peak SAR located on 417.5125 MHz for Face Up Mode and Body Back Mode. Max. Maximum 1 g SAR Value(W/kg) Frequency Meas. output Scaled Test Mode (MHz) Power Power Factor Meas. 50% Scaled Plot (W) (W) SAR SAR 400.0125 4.58 5 1.092 6.41 3.205 3.50 1# 417.5125 4.47 5 1.119 8.78 4.39 4.91 2# FM 435.0125 4.77 5 1.048 9.13 4.565 4.78 3# 12.5 kHz 452.4875 4.54 5 1.101 6.43 3.215 3.54 4# Face Up 469.9875 4.72 5 1.059 4.36 2.18 2.31 5# (25 mm) 400.0125 / / / / / / / 417.5125 4.70 5 1.064 4.35 2.175 2.31 6# 4FSK 435.0125 / / / / / / / 12.5 kHz 452.4875 / / / / / / / 469.9875 / / / / / / / 400.0125 4.58 5 1.092 7.71 3.855 4.21 7# 417.5125 4.47 5 1.119 10.5 5.25 5.87 8# FM 435.0125 4.77 5 1.048 9.57 4.785 5.01 9# 12.5 kHz 452.4875 4.54 5 1.101 5.86 2.93 3.23 10# Body 469.9875 4.72 5 1.059 4.19 2.095 2.22 11# Back (0 mm) 400.0125 / / / / / / / 417.5125 4.70 5 1.064 4.71 2.355 2.51 12# 4FSK 435.0125 / / / / / / / 12.5 kHz 452.4875 / / / / / / / 469.9875 / / / / / / / Note: 1. When the 1-g SAR is ≤ 3.5W/kg, testing for other channels are optional. 2. KDB 447498 D01 - A duty factor of 50% should be applied to determine compliance for radios with maximum operating duty factors ≤ 50%. The 50% duty factor only applies to exposure conditions where the radio operates with a mechanical PTT button. 3. The whole antenna and radiating structures that may contribute to the measured SAR or influence the SAR distribution has been included in the area scan. SAR Evaluation Report 23 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A SAR Measurement Variability In accordance with published RF Exposure KDB procedure 865664 D01 SAR measurement 100 MHz to 6 GHz v01. These additional measurements are repeated after the completion of all measurements requiring the same head or body tissue-equivalent medium in a frequency band. The test device should be returned to ambient conditions (normal room temperature) with the battery fully charged before it is re-mounted on the device holder for the repeated measurement(s) to minimize any unexpected variations in the repeated results 1) Repeated measurement is not required when the original highest measured SAR is < 0.80 W/kg. 2) When the original highest measured SAR is ≥ 0.80 W/kg, repeat that measurement once. 3) Perform a second repeated measurement only if the ratio of largest to smallest SAR for the original and first repeated measurements is > 1.20 or when the original or repeated measurement is ≥ 1.45 W/kg (~ 10% from the 1-g SAR limit). 4) Perform a third repeated measurement only if the original, first or second repeated measurement is ≥1.5 W/kg and the ratio of largest to smallest SAR for the original, first and second repeated measurements is > 1.20. 5) The same procedures should be adapted for measurements according to occupational exposure limits by applying a factor of 2.5 for extremity exposure and a factor of 5 for occupational exposure to the corresponding SAR thresholds. Note: The same procedures should be adapted for measurements according to extremity and occupational exposure limits by applying a factor of 2.5 for extremity exposure and a factor of 5 for occupational exposure to the corresponding SAR thresholds. The Highest Measured SAR Configuration in Each Frequency Band Head(Face Up) Meas. SAR (W/kg) Largest to Frequency Band Freq.(MHz) EUT Position Smallest Original Repeated SAR Ratio (350-550 MHz) 435.0125 Face Up 9.13 9.1 1.01 PTT_FM 12.5kHz Body(Body Back) Meas. SAR (W/kg) Largest to Frequency Band Freq.(MHz) EUT Position Smallest Original Repeated SAR Ratio (350-550 MHz) 417.5125 Body Back 10.5 9.95 1.06 PTT_FM 12.5kHz Note: 1. Second Repeated Measurement is not required since the ratio of the largest to smallest SAR for the original and first repeated measurement is not > 1.20. 2. The measured SAR results do not have to be scaled to the maximum tune-up tolerance to determine if repeated measurements are required. 3. SAR measurement variability must be assessed for each frequency band, which is determined by the SAR probe calibration point and tissue-equivalent medium used for the device measurements. SAR Evaluation Report 24 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A SAR Plots Please Refer to the Attachment. SAR Evaluation Report 25 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A APPENDIX A MEASUREMENT UNCERTAINTY The uncertainty budget has been determined for the measurement system and is given in the following Table. Measurement uncertainty evaluation for IEEE1528-2013 SAR test Tolerance/ Standard Standard Source of Probability ci ci uncertainty Divisor uncertainty uncertainty uncertainty distribution (1 g) (10 g) ±% ± %, (1 g) ± %, (10 g) Measurement system Probe calibration 6.55 N 1 1 1 6.6 6.6 Axial Isotropy 4.7 R √3 1 1 2.7 2.7 Hemispherical Isotropy 9.6 R √3 0 0 0.0 0.0 Boundary effect 1.0 R √3 1 1 0.6 0.6 Linearity 4.7 R √3 1 1 2.7 2.7 Detection limits 1.0 R √3 1 1 0.6 0.6 Readout electronics 0.3 N 1 1 1 0.3 0.3 Response time 0.0 R √3 1 1 0.0 0.0 Integration time 0.0 R √3 1 1 0.0 0.0 RF ambient conditions – 1.0 R √3 1 1 0.6 0.6 noise RF ambient 1.0 R √3 1 1 0.6 0.6 conditions–reflections Probe positioner mech. 0.8 R √3 1 1 0.5 0.5 Restrictions Probe positioning with 6.7 R √3 1 1 3.9 3.9 respect to phantom shell Post-processing 2.0 R √3 1 1 1.2 1.2 Test sample related Test sample positioning 2.8 N 1 1 1 2.8 2.8 Device holder uncertainty 6.3 N 1 1 1 6.3 6.3 Drift of output power 5.0 R √3 1 1 2.9 2.9 Phantom and set-up Phantom uncertainty (shape 4.0 R √3 1 1 2.3 2.3 and thickness tolerances) Liquid conductivity target) 5.0 R √3 0.64 0.43 1.8 1.2 Liquid conductivity meas.) 2.5 N 1 0.64 0.43 1.6 1.1 Liquid permittivity target) 5.0 R √3 0.6 0.49 1.7 1.4 Liquid permittivity meas.) 2.5 N 1 0.6 0.49 1.5 1.2 Combined standard RSS 12.2 12.0 uncertainty Expanded uncertainty 95 % 24.3 23.9 confidence interval) SAR Evaluation Report 26 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A Measurement uncertainty evaluation for IEC62209-2 SAR test Tolerance/ Standard Standard Source of Probability ci ci uncertainty Divisor uncertainty uncertainty uncertainty distribution (1 g) (10 g) ±% ± %, (1 g) ± %, (10 g) Measurement system Probe calibration 6.55 N 1 1 1 6.6 6.6 Axial Isotropy 4.7 R √3 1 1 2.7 2.7 Hemispherical Isotropy 9.6 R √3 0 0 0.0 0.0 Linearity 4.7 R √3 1 1 2.7 2.7 Modulation Response 0.0 R √3 1 1 0.0 0.0 Detection limits 1.0 R √3 1 1 0.6 0.6 Boundary effect 1.0 R √3 1 1 0.6 0.6 Readout electronics 0.3 N 1 1 1 0.3 0.3 Response time 0.0 R √3 1 1 0.0 0.0 Integration time 0.0 R √3 1 1 0.0 0.0 RF ambient conditions – 1.0 R √3 1 1 0.6 0.6 noise RF ambient 1.0 R √3 1 1 0.6 0.6 conditions–reflections Probe positioner mech. 0.8 R √3 1 1 0.5 0.5 Restrictions Probe positioning with 6.7 R √3 1 1 3.9 3.9 respect to phantom shell Post-processing 2.0 R √3 1 1 1.2 1.2 Test sample related Device holder Uncertainty 6.3 N 1 1 1 6.3 6.3 Test sample positioning 2.8 N 1 1 1 2.8 2.8 Power scaling 4.5 R √3 1 1 2.6 2.6 Drift of output power 5.0 R √3 1 1 2.9 2.9 Phantom and set-up Phantom uncertainty (shape 4.0 R √3 1 1 2.3 2.3 and thickness tolerances) Algorithm for correcting SAR for deviations in permittivity 1.9 N 1 1 0.84 1.1 0.9 and conductivity Liquid conductivity (meas.) 2.5 N 1 0.64 0.43 1.6 1.1 Liquid permittivity (meas.) 2.5 N 1 0.6 0.49 1.5 1.2 Temp. unc. - Conductivity 1.7 R √3 0.78 0.71 0.8 0.7 Temp. unc. - Permittivity 0.3 R √3 0.23 0.26 0.0 0.0 Combined standard RSS 12.2 12.1 uncertainty Expanded uncertainty 95 % 24.5 24.2 confidence interval) SAR Evaluation Report 27 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A APPENDIX B EUT TEST POSITION PHOTOS Please Refer to the Attachment. SAR Evaluation Report 28 of 29

Bay Area Compliance Laboratories Corp. (Dongguan) Report No.: RDG190320007-20A APPENDIX C CALIBRATION CERTIFICATES Please Refer to the Attachment. ***** END OF REPORT ***** SAR Evaluation Report 29 of 29


Document Created: 2019-07-24 22:17:20
Document Modified: 2019-07-24 22:17:20
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