SAR Report

FCC ID: XRAFB507

RF Exposure Info

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FCCID_4406011

SAR EVALUATION REPORT IEEE Std 1528-2013 For Smartwatch FCC ID: XRAFB507 Model Name: FB507 Report Number: 12804406-S1V1 Issue Date: 6/7/2019 Prepared for Fitbit Inc. 199 Fremont St, 14th Floor San Francisco, CA 94105, U.S.A. Prepared by UL VERIFICATION SERVICES INC. 47173 BENICIA STREET FREMONT, CA 94538, U.S.A. TEL: (510) 319-4000 FAX: (510) 661-0888 NVLAP LAB CODE 200065-0

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 Revision History Rev. Date Revisions Revised By V1 6/7/2019 Initial Issue -- Page 2 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 Table of Contents 1. Attestation of Test Results ......................................................................................................... 4 2. Test Specification, Methods and Procedures............................................................................ 5 3. Facilities and Accreditation ........................................................................................................ 5 4. SAR Measurement System & Test Equipment .......................................................................... 6 4.1. SAR Measurement System ........................................................................................................ 6 4.2. SAR Scan Procedures ............................................................................................................... 7 4.3. Test Equipment.......................................................................................................................... 9 5. Measurement Uncertainty ........................................................................................................... 9 6. Device Under Test (DUT) Information ...................................................................................... 10 6.1. DUT Description ...................................................................................................................... 10 6.2. Wireless Technologies ............................................................................................................. 10 7. RF Exposure Conditions (Test Configurations) ...................................................................... 11 8. Dielectric Property Measurements & System Check .............................................................. 12 8.1. Dielectric Property Measurements ........................................................................................... 12 8.2. System Check.......................................................................................................................... 13 9. Conducted Output Power Measurements................................................................................ 14 9.1. Wi-Fi 2.4GHz (DTS Band) ....................................................................................................... 14 9.2. Bluetooth ................................................................................................................................. 15 10. Measured and Reported (Scaled) SAR Results ....................................................................... 16 10.1. Wi-Fi (DTS Band) ................................................................................................................. 17 10.2. Bluetooth .............................................................................................................................. 17 11. SAR Measurement Variability ................................................................................................... 18 12. Simultaneous Transmission SAR Analysis ............................................................................. 18 Appendixes .......................................................................................................................................... 19 Appendix A: SAR Setup Photos ......................................................................................................... 19 Appendix B: SAR System Check Plots ............................................................................................... 19 Appendix C: SAR Highest Test Plots .................................................................................................. 19 Appendix D: SAR Tissue Ingredients.................................................................................................. 19 Appendix E: SAR Probe Certificates................................................................................................... 19 Appendix F: SAR Dipole Certificates .................................................................................................. 19 Page 3 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 1. Attestation of Test Results Applicant Name Fitbit Inc. FCC ID XRAFB507 Model Name FB507 FCC 47 CFR § 2.1093 Applicable Standards Published RF exposure KDB procedures IEEE Std 1528-2013 SAR Limits (W/Kg) Exposure Category Extremities (hands, wrists, ankles, Peak spatial-average(1g of tissue) etc.) (10g of tissue) General population / 1.6 4 Uncontrolled exposure Equipment Class - Highest Reported SAR (W/kg) RF Exposure Conditions DTS DSS Next-to-Mouth 0.807 0.141 Extremity 0.127 0.017 Date Tested 4/15/2018 to 5/29/2019 Test Results Pass UL Verification Services Inc. tested the above equipment in accordance with the requirements set forth in the above standards. The test results show that the equipment tested is capable of demonstrating compliance with the requirements as documented in this report. The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein. It is the manufacturer's responsibility to assure that additional production units of this model are manufactured with identical electrical and mechanical components. All samples tested were in good operating condition throughout the entire test program. Measurement Uncertainties are published for informational purposes only and were not taken into account unless noted otherwise. This document may not be altered or revised in any way unless done so by UL Verification Services Inc. and all revisions are duly noted in the revisions section. Any alteration of this document not carried out by UL Verification Services Inc. will constitute fraud and shall nullify the document. This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST, any agency of the Federal Government, or any agency of the U.S. government. Approved & Released By: Prepared By: Devin Chang Jason Kuo Senior Test Engineer Laboratory Technician UL Verification Services Inc. UL Verification Services Inc. Page 4 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 2. Test Specification, Methods and Procedures The tests documented in this report were performed in accordance with FCC 47 CFR § 2.1093, IEEE STD 1528- 2013, the following FCC Published RF exposure KDB procedures: • 248227 D01 802.11 Wi-Fi SAR v02r02 • 447498 D01 General RF Exposure Guidance v06 • 865664 D01 SAR measurement 100 MHz to 6 GHz v01r04 • 865664 D02 RF Exposure Reporting v01r02 In addition to the above, the following information was used: • TCB workshop October 2016; RF Exposure Procedures (Bluetooth Duty Factor) • TCB workshop October 2016; RF Exposure Procedures (DUT Holder Perturbations) • TCB workshop April 2019; RF Exposure Procedures (Tissue Simulating Liquids (TSL)) 3. Facilities and Accreditation The test sites and measurement facilities used to collect data are located at 47173 Benicia Street 47266 Benicia Street SAR Lab A SAR Lab 1 SAR Lab B SAR Lab 2 SAR Lab C SAR Lab 3 SAR Lab D SAR Lab 5 SAR Lab E SAR Lab 6 SAR Lab F SAR Lab 7 SAR Lab G SAR Lab 8 SAR Lab H SAR Lab 9 UL Verification Services Inc. is accredited by NVLAP, Laboratory Code 200065-0. Page 5 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 4. SAR Measurement System & Test Equipment 4.1. SAR Measurement System The DASY5 system used for performing compliance tests consists of the following items: • 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 amplification, 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 WinXP or Win7 and the DASY5 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. Page 6 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 4.2. SAR Scan Procedures Step 1: Power Reference Measurement The Power Reference Measurement and Power Drift Measurements are for monitoring the power drift of the device under test in the batch process. The minimum distance of probe sensors to surface determines the closest measurement point to phantom surface. The minimum distance of probe sensors to surface is 2.1 mm. This distance cannot be smaller than the distance of sensor calibration points to probe tip as defined in the probe properties. Step 2: Area Scan The Area Scan is used as a fast scan in two dimensions to find the area of high field values, before doing a fine measurement around the hot spot. The sophisticated interpolation routines implemented in DASY software can find the maximum locations even in relatively coarse grids. When an Area Scan has measured all reachable points, it computes the field maximal found in the scanned area, within a range of the global maximum. The range (in dB) is specified in the standards for compliance testing. For example, a 2 dB range is required in IEEE Standard 1528 and IEC 62209 standards, whereby 3 dB is a requirement when compliance is assessed in accordance with the ARIB standard (Japan). If only one Zoom Scan follows the Area Scan, then only the absolute maximum will be taken as reference. For cases where multiple maximums are detected, the number of Zoom Scans has to be increased accordingly. Area Scan Parameters extracted from KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz Page 7 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 Step 3: Zoom Scan Zoom Scans are used to assess the peak spatial SAR values within a cubic averaging volume containing 1 g and 10 g of simulated tissue. The Zoom Scan measures points (refer to table below) within a cube whose base faces are centered on the maxima found in a preceding area scan job within the same procedure. When the measurement is done, the Zoom Scan evaluates the averaged SAR for 1 g and 10 g and displays these values next to the job’s label. Zoom Scan Parameters extracted from KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz Step 4: Power drift measurement The Power Drift Measurement measures the field at the same location as the most recent power reference measurement within the same procedure, and with the same settings. The Power Drift Measurement gives the field difference in dB from the reading conducted within the last Power Reference Measurement. This allows a user to monitor the power drift of the device under test within a batch process. The measurement procedure is the same as Step 1. Page 8 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 4.3. Test Equipment The measuring equipment used to perform the tests documented in this report has been calibrated in accordance with the manufacturers’ recommendations, and is traceable to recognized national standards. Dielectric Property Measurements Name of Equipment Manufacturer Type/Model Serial No. Cal. Due Date Vector Network Analyzer Rhode & Schwarz ZNLE6 101274-mn 3/7/2020 Dielectric Probe kit SPEAG DAK-3.5 1082 9/11/2019 Shorting Block SPEAG DAK-3.5 Short SM DAK 200 BA 2/6/2020 Thermometer Keysight Traceable 140562250 3/5/2020 System Check Name of Equipment Manufacturer Type/Model Serial No. Cal. Due Date Signal Generator Rhode & Schwarz SMB100A 180970 2/13/2020 Power Sensor Rhode & Schwarz NRP18A 100994 2/15/2020 Synthesized Signal Generator Agilent N5181A MY50140610 1/31/2020 Power Meter Keysight N1912A MY50001018 1/30/2020 Power Sensor Agilent N1921A MY53020038 4/23/2019* Power Sensor Agilent N1921A MY52260009 2/5/2020 Amplifier MITEQ AMF-4D-00400600-50-30P 1795092 N/A Directional coupler Werlatone C8060-102 2149 N/A DC Power Supply Sorensen XT 15-4 1817A02680 N/A Signal Generator Rhode & Schwarz SMB100A 1890968-gX 2/14/2020 Power Sensor Rhode & Schwarz NRP18A 100995-hs 2/15/2020 *Lab equipment was not used past calibration due date Lab Equipment Name of Equipment Manufacturer Type/Model Serial No. Cal. Due Date E-Field Probe (SAR Lab 1) SPEAG EX3DV4 3749 1/25/2020 E-Field Probe (SAR Lab 2) SPEAG EX3DV4 7483 11/14/2019 Data Acquisition Electronics (SAR Lab 1) SPEAG DAE4 1546 5/3/2019* Data Acquisition Electronics (SAR Lab 2) SPEAG DAE4 1359 2/15/2020 System Validation Dipole SPEAG D2450V2 748 2/16/2020 *Lab equipment was not used past calibration due date Other Name of Equipment Manufacturer Type/Model T Number Serial No. Cal. Due Date Power Meter Agilent N1921A T1270 MY55196015 1/26/2020 Power Sensor Agilent N1921A T309 MY52270022 2/6/2020 5. Measurement Uncertainty Per KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz, when the highest measured 1-g SAR within a frequency band is < 1.5 W/kg and the measured 10-g SAR within a frequency band is < 3.75 W/kg, the extensive SAR measurement uncertainty analysis described in IEEE Std 1528-2013 is not required in SAR reports submitted for equipment approval. Page 9 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 6. Device Under Test (DUT) Information 6.1. DUT Description Device Dimension See Appendix A for dimensions. Back Cover The Back Cover is not removable Battery Options The rechargeable battery is not user accessible. Accessory Removable wristbands: rubber, mesh, link, and tri-link S/N Notes 233F3346B061 Conducted Sample EVT2-A3-053 Radiated Sample Test sample information EVT2-A3-217 Radiated Sample EVT2-A3-200 Radiated Sample EVT2-A1-B263 Radiated Sample EVT-A1-B195 Radiated Sample Hardware Version EVT2 Software Version 35.6.0.10 6.2. Wireless Technologies Wireless Duty Cycle used for Frequency bands Operating mode technologies SAR testing 802.11b Wi-Fi 2.4 GHz 802.11g 100% (802.11b) 1 802.11n (HT20) Bluetooth 2.4 GHz BR, EDR, LE 78.25%2 Notes: 1. Duty cycle for Wi-Fi is referenced from the DTS report 2. Refer to §9.2 for measured Duty Cycle. Page 10 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 7. RF Exposure Conditions (Test Configurations) Refer to “SAR Photos and Ant locations” Appendix for the specific details of the antenna-to-antenna and antenna-to-edge(s) distances. Wireless RF Exposure DUT-to-User Test Antenna-to- SAR Note technologies Conditions Separation Position edge/surface Required Extremity 0 Rear N/A Yes WLAN (Hand/Wrist/Ankle) Next to Mouth 10 Front N/A Yes Test Rationale The DUT may be supplied with one of four available bracelets. There is a plastic bracelet and three metal bracelets described as mesh, link and tri-link. See appendix A for pictures of the DUT with each bracelet. Initial testing was performed using the plastic bracelet. The measurement with the highest reported SAR was repeated for each of the metallic bracelets. Page 11 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 8. Dielectric Property Measurements & System Check 8.1. Dielectric Property Measurements The temperature of the tissue-equivalent medium used during measurement must also be within 18C to 25C and within ± 2C of the temperature when the tissue parameters are characterized. The dielectric parameters must be measured before the tissue-equivalent medium is used in a series of SAR measurements. The parameters should be re-measured after each 3 – 4 days of use; or earlier if the dielectric parameters can become out of tolerance; for example, when the parameters are marginal at the beginning of the measurement series. Tissue dielectric parameters were measured at the low, middle and high frequency of each operating frequency range of the test device. The dielectric constant (εr) and conductivity (σ) of typical tissue-equivalent media recipes are expected to be within ± 5% of the required target values; but for SAR measurement systems that have implemented the SAR error compensation algorithms documented in IEEE Std 1528-2013, to automatically compensate the measured SAR results for deviations between the measured and required tissue dielectric parameters, the tolerance for εr and σ may be relaxed to ± 10%. This is limited to frequencies ≤ 3 GHz. Tissue Dielectric Parameters FCC KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz Head Body Target Frequency (MHz) er s (S/m) er s (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 5000 36.2 4.45 49.3 5.07 5100 36.1 4.55 49.1 5.18 5200 36.0 4.66 49.0 5.30 5300 35.9 4.76 48.9 5.42 5400 35.8 4.86 48.7 5.53 5500 35.6 4.96 48.6 5.65 5600 35.5 5.07 48.5 5.77 5700 35.4 5.17 48.3 5.88 5800 35.3 5.27 48.2 6.00 IEEE Std 1528-2013 Refer to Table 3 within the IEEE Std 1528-2013 IEC 62209-1 Refer to Table A.3 within the IEC 62209-1 Dielectric Property Measurements Results: Relative Permittivity (єr) Conductivity (σ) SAR Band Tissue Frequency Date Delta Delta Lab (MHz) Type (MHz) Measured Target Measured Target (%) (%) 2450 38.10 39.20 -2.81 1.82 1.80 1.06 1 4/15/2019 2450 Head 2400 38.18 39.30 -2.84 1.78 1.75 1.56 2480 38.07 39.16 -2.79 1.84 1.83 0.30 2450 38.63 39.20 -1.45 1.88 1.80 4.61 2 5/28/2019 2450 Head 2400 38.33 39.30 -2.46 1.80 1.75 2.99 2480 38.62 39.16 -1.38 1.88 1.83 2.54 Page 12 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 8.2. System Check SAR system verification is required to confirm measurement accuracy, according to the tissue dielectric media, probe calibration points and other system operating parameters required for measuring the SAR of a test device. The system verification must be performed for each frequency band and within the valid range of each probe calibration point required for testing the device. The same SAR probe(s) and tissue-equivalent media combinations used with each specific SAR system for system verification must be used for device testing. When multiple probe calibration points are required to cover substantially large transmission bands, independent system verifications are required for each probe calibration point. A system verification must be performed before each series of SAR measurements using the same probe calibration point and tissue-equivalent medium. Additional system verification should be considered according to the conditions of the tissue-equivalent medium and measured tissue dielectric parameters, typically every three to four days when the liquid parameters are re-measured or sooner when marginal liquid parameters are used at the beginning of a series of measurements. System Performance Check Measurement Conditions: • The measurements were performed in the flat section of the TWIN SAM or ELI phantom, shell thickness: 2.0 ±0.2 mm (bottom plate) filled with Body or Head simulating liquid of the following parameters. • The depth of tissue-equivalent liquid in a phantom must be ≥ 15.0 cm for SAR measurements ≤ 3 GHz and ≥ 10.0 cm for measurements > 3 GHz. • The DASY system with an E-Field Probe was used for the measurements. • The dipole was mounted on the small tripod so that the dipole feed point was positioned below the center marking of the flat phantom section and the dipole was oriented parallel to the body axis (the long side of the phantom). The standard measuring distance was 10 mm (above 1 GHz) and 15 mm (below 1 GHz) from dipole center to the simulating liquid surface. • The coarse grid with a grid spacing of 15 mm was aligned with the dipole. For 5 GHz band - The coarse grid with a grid spacing of 10 mm was aligned with the dipole. • Special 7x7x7 (below 3 GHz) and/or 8x8x7 (above 3 GHz) fine cube was chosen for the cube. • Distance between probe sensors and phantom surface was set to 3 mm. For 5 GHz band - Distance between probe sensors and phantom surface was set to 2.5 mm • The dipole input power (forward power) was 100 mW. • The results are normalized to 1 W input power. System Check Results The 1-g and 10-g SAR measured with a reference dipole, using the required tissue-equivalent medium at the test frequency, must be within ±10% of the manufacturer calibrated dipole SAR target. Measured Results for 1g SAR Measured Results for 10g SAR SAR Tissue Dipole Type Dipole Plot Date Lab Type _Serial # Cal. Due Data Zoom Scan Normalize Target Delta Zoom Scan Normalize Target Delta No. to 100 mW to 1 W (Ref. Value) ±10 % to 100 mW to 1 W (Ref. Value) ±10 % 1 4/15/2019 Head D2450V2 SN:748 2/16/2020 5.620 54.10 52.00 4.04 2.590 24.90 24.20 2.89 1,2 2 5/28/2019 Head D2450V2 SN:748 2/16/2020 5.410 53.40 52.00 2.69 2.490 24.70 24.20 2.07 3,4 Page 13 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 9. Conducted Output Power Measurements 9.1. Wi-Fi 2.4GHz (DTS Band) The maximum output power specified for production units are determined for all applicable 802.11 transmission modes in each standalone and aggregated frequency band. Maximum output power is measured for the highest maximum output power configuration(s) in each frequency band according to the default power measurement procedures. For “No”, SAR Test reduction was applied from KDB 248227 guidance, Sec. 2.1, b), 1) when the same maximum power is specified for multiple transmission modes in a frequency band, the largest channel bandwidth, lowest order modulation, lowest data rate and lowest order 802.11b/g/n mode is used for SAR measurement, on the highest measured output power channel in the initial test configuration, for each frequency band. Additional output power measurements were not deemed necessary. Wi-Fi 2.4GHz Measured Results Average Power (dBm) Freq. Band Mode Ch # SAR Test (MHz) Meas Pwr Tune-up (Yes/No) 1 2412 18.0 20.0 6 2437 18.0 20.0 DSSS 802.11b 11 2462 18.0 20.0 Yes 2.4 GHz 12 2467 18.0 20.0 13 2472 16.0 18.0 1 2412 19.0 6 2437 20.0 802.11g 11 2462 19.5 No 12 2467 17.0 OFDM 13 2472 9.0 2.4 GHz 1 2412 18.5 6 2437 20.0 802.11n 11 2462 19.0 No (HT20) 12 2467 17.0 13 2472 5.0 Page 14 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 9.2. Bluetooth From October 2016 TCB workshop, Power and SAR were measured with the device connected to a call box with hopping disabled using DH5 modulation. The duty cycle value from the device is taken from the Duty Cycle plot below. Bluetooth Measured Results Average Pow er (dBm ) Freq. Band Mode Ch # SAR Test (MHz) Meas Pw r Tune-up (Yes/No) 0 2402 13.9 14.5 BR 39 2441 12.0 13.0 Yes GFSK 78 2480 12.5 13.0 0 2402 11.1 12.0 EDR, 39 2441 11.1 12.0 No π /4 DQPSK 78 2480 10.9 12.0 2.4 0 2402 11.3 12.0 EDR, 39 2441 11.7 12.0 No 8-DPSK 78 2480 11.0 12.0 0 2402 8.0 10.0 LE, 19 2440 8.0 10.0 No GFSK 39 2480 9.0 10.0 Duty Factor Measured Results T on Period Crest Factor Mode Type Duty Cycle (ms) (ms) (1/duty cycle) GFSK DH5 2.935 3.751 78.25% 1.28 Note(s): Duty Cycle = (T on / period) * 100% Duty Cycle plots GFSK Page 15 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 10. Measured and Reported (Scaled) SAR Results SAR Test Reduction criteria are as follows: • Reported SAR(W/kg) for Bluetooth = Measured SAR *Tune-up Scaling Factor • Reported SAR(W/kg) for Wi-Fi = Measured SAR * Tune-up scaling factor * Duty Cycle scaling factor • Duty Cycle scaling factor = 1 / Duty cycle (%) KDB 447498 D01 General RF Exposure Guidance: Testing of other required channels within the operating mode of a frequency band is not required when the reported 1-g or 10-g SAR for the mid-band or highest output power channel is: 1. ≤ 0.8 W/kg or 2.0 W/kg, for 1-g or 10-g respectively, when the transmission band is ≤ 100 MHz 2. ≤ 0.6 W/kg or 1.5 W/kg, for 1-g or 10-g respectively, when the transmission band is between 100 MHz and 200 MHz 3. ≤ 0.4 W/kg or 1.0 W/kg, for 1-g or 10-g respectively, when the transmission band is ≥ 200 MHz KDB 248227 D01 SAR meas for 802.11: SAR test reduction for 802.11 Wi-Fi transmission mode configurations are considered separately for DSSS and OFDM. An initial test position is determined to reduce the number of tests required for certain exposure configurations with multiple test positions. An initial test configuration is determined for each frequency band and aggregated band according to maximum output power, channel bandwidth, wireless mode configurations and other operating parameters to streamline the measurement requirements. For 2.4 GHz DSSS, either the initial test position or DSSS procedure is applied to reduce the number of SAR tests; these are mutually exclusive. For OFDM, an initial test position is only applicable to next to the ear, UMPC mini-tablet and hotspot mode configurations, which is tested using the initial test configuration to facilitate test reduction. For other exposure conditions with a fixed test position, SAR test reduction is determined using only the initial test configuration. The multiple test positions require SAR measurements in head, hotspot mode or UMPC mini-tablet configurations may be reduced according to the highest reported SAR determined using the initial test position(s) by applying the DSSS or OFDM SAR measurement procedures in the required wireless mode test configuration(s). The initial test position(s) is measured using the highest measured maximum output power channel in the required wireless mode test configuration(s). When the reported SAR for the initial test position is: 4. ≤ 0.4 W/kg, further SAR measurement is not required for the other test positions in that exposure configuration and wireless mode combination within the frequency band or aggregated band. DSSS and OFDM configurations are considered separately according to the required SAR procedures. 5. > 0.4 W/kg, SAR is repeated using the same wireless mode test configuration tested in the initial test position to measure the subsequent next closet/smallest test separation distance and maximum coupling test position, on the highest maximum output power channel, until the reported SAR is ≤ 0.8 W/kg or all required test positions are tested. 1) For subsequent test positions with equivalent test separation distance or when exposure is dominated by coupling conditions, the position for maximum coupling condition should be tested. 2) When it is unclear, all equivalent conditions must be tested. 6. For all positions/configurations tested using the initial test position and subsequent test positions, when the reported SAR is > 0.8 W/kg, measure the SAR for these positions/configurations on the subsequent next highest measured output power channel(s) until the reported SAR is ≤ 1.2 W/kg or all required test channels are considered. 1) The additional power measurements required for this step should be limited to those necessary for identifying subsequent highest output power channels to apply the test reduction. 7. When the specified maximum output power is the same for both UNII 1 and UNII 2A, begin SAR measurements in UNII 2A with the channel with the highest measured output power. If the reported SAR for UNII 2A is ≤ 1.2 W/kg, SAR is not required for UNII 1; otherwise treat the remaining bands separately and test them independently for SAR. 8. When the specified maximum output power is different between UNII 1 and UNII 2A, begin SAR with the band that has the higher specified maximum output. If the highest reported SAR for the band with the highest specified power is ≤ 1.2 W/kg, testing for the band with the lower specified output power is not required; otherwise test the remaining bands independently for SAR. To determine the initial test position, Area Scans were performed to determine the position with the Maximum Value of SAR (measured). The position that produced the highest Maximum Value of SAR is considered the worst case position; thus used as the initial test position. Page 16 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 10.1. Wi-Fi (DTS Band) When the 802.11b reported SAR of the highest measured maximum output power channel is ≤ 0.8 W/kg, no further SAR testing is required. If SAR is > 0.8 W/kg and ≤ 1.2 W/kg, SAR is required for the next highest measured output power channel. Finally, if SAR is > 1.2 W/kg, SAR is required for the third channel. SAR testing is not required for OFDM mode(s) when the highest reported SAR for DSSS is adjusted by the ratio of OFDM to DSSS specified maximum output power and the adjusted SAR is ≤ 1.2 W/kg. Power (dBm) 1-g SAR (W/kg) RF Exposure Dist. Wrist-Band Freq. Plot Mode Test Position Ch #. Duty Cycle Tune-up Conditions (mm) Tested (MHz) Meas. Meas. Scaled No. limit 1 2412.0 100.0% 20.0 18.0 0.457 0.724 Plastic 6 2437.0 100.0% 20.0 18.0 0.464 0.735 802.11b 11 2462.0 100.0% 20.0 18.0 0.509 0.807 1 Next-to-Mouth 10 Front 1 Mbps Mesh 11 2462.0 100.0% 20.0 18.0 0.241 0.382 Link 11 2462.0 100.0% 20.0 18.0 0.260 0.412 Tri-Link 11 2462.0 100.0% 20.0 18.0 0.290 0.460 Power (dBm) 10-g SAR (W/kg) RF Exposure Dist. Wrist-Band Freq. Plot Mode Test Position Ch #. Duty Cycle Tune-up Conditions (mm) Tested (MHz) Meas. Meas. Scaled No. limit 1 2412.0 100.0% 20.0 18.0 0.062 0.098 Plastic 6 2437.0 100.0% 20.0 18.0 0.080 0.127 2 802.11b 11 2462.0 100.0% 20.0 18.0 0.078 0.124 Extremity 0 Rear 1 Mbps Mesh 6 2437.0 100.0% 20.0 18.0 0.029 0.046 Link 6 2437.0 100.0% 20.0 18.0 0.020 0.032 Tri-Link 6 2437.0 100.0% 20.0 18.0 0.012 0.019 10.2. Bluetooth Power (dBm) 1-g SAR (W/kg) RF Exposure Dist. Wrist-Band Freq. Plot Mode Test Position Ch #. Tune-up Conditions (mm) Tested (MHz) Meas. Meas. Scaled No. limit 0 2402.0 14.5 13.9 0.123 0.141 3 Plastic 39 2441.0 13.0 12.0 0.099 0.125 78 2480.0 13.0 12.5 0.109 0.122 GFSK Next-to-Mouth 10 Front Mesh 0 2402.0 14.5 13.9 0.074 0.085 Link 0 2402.0 14.5 13.9 0.085 0.098 Tri-Link 0 2402.0 14.5 13.9 0.094 0.108 Power (dBm) 10-g SAR (W/kg) RF Exposure Dist. Wrist-Band Freq. Plot Mode Test Position Ch #. Tune-up Conditions (mm) Tested (MHz) Meas. Meas. Scaled No. limit 0 2402.0 14.5 13.9 0.015 0.017 4 Plastic 39 2441.0 13.0 12.0 0.004 0.005 78 2480.0 13.0 12.5 0.002 0.002 GFSK Extremity 0 Rear Mesh 0 2402.0 14.5 13.9 0.012 0.014 Link 0 2402.0 14.5 13.9 0.006 0.007 Tri-Link 0 2402.0 14.5 13.9 0.014 0.016 Page 17 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 11. SAR Measurement Variability In accordance with published RF Exposure KDB 865664 D01 SAR measurement 100 MHz to 6 GHz. 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. o Repeated measurement is not required when the original highest measured SAR is <0.8 or 2 W/kg (1-g or 10-g respectively); steps 2) through 4) do not apply. o When the original highest measured SAR is ≥ 0.8 or 2 W/kg (1-g or 10-g respectively), repeat that measurement once. o 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 or 3.6 W/kg (~ 10% from the 1-g or 10-g respective SAR limit). o Perform a third repeated measurement only if the original, first, or second repeated measurement is ≥ 1.5 or 3.75 W/kg (1-g or 10-g respectively) and the ratio of largest to smallest SAR for the original, first and second repeated measurements is > 1.20. Note(s): Repeated measurement is not required since the original highest measured SAR is <0.8 W/kg (1-g) or 2 W/kg (10-g) . 12. Simultaneous Transmission SAR Analysis Does not Support Page 18 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.

Report No.: 12804406-S1V1 Issue Date: 6/7/2019 Appendixes Refer to separated files for the following appendixes. Appendix A: SAR Setup Photos Appendix B: SAR System Check Plots Appendix C: SAR Highest Test Plots Appendix D: SAR Tissue Ingredients Appendix E: SAR Probe Certificates Appendix F: SAR Dipole Certificates END OF REPORT Page 19 of 19 UL Verification Services Inc. Doc. No.: 1.0 This report shall not be reproduced without the written approval of UL Verification Services Inc.


Document Created: 2019-08-25 09:06:02
Document Modified: 2019-08-25 09:06:02
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