SAR

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RF Exposure Info

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  Uni#+nTrust                                                   Page 1 of 10                          Report No.: 190726004RFC—2




                                  SAR TEST EXCLUSION
                                  EVALUATION REPORT

                                                                            True Wireless Earbuds with Active Noise
                                                 Product Name:
                                                                            Cancellation
                                                      Trade Mark:           EDIFIER
                                         Model No. / HVIN:                  TWS NB
                                    Add. Model No. / HVIN:                  N/A
                                          Report Number:                    190726004RFC—2
                                                                            FCC 47 CFR Part 2.1093
                                               Test Standards:
                                                                            RSS—102 Issue 5
                                                            FCC ID:         Z9G—EDF94
                                                                    IC:     10004A—EDF94
                                                     Test Result:           PASS
                                                  Date of Issue:            September 5, 2019


                                                                  Prepared for:


                                        Edifier International Limited
                               P.O. Box 6264 General Post Office Hong Kong

                                                                  Prepared by:
                  Shenzhen UnionTrust Quality and Technology Co., Ltd.
            16/F, Block A, Building 6, Baoneng Science and Technology Park,
              Qingxiang Road No.1, Longhua New District, Shenzhen, China
                                                   TEL: +86—755—2823 0888
                                                   FAX: +86—755—2823 0886



                 Prepared by:                                                      Reviewed by:
                                                                                                                  Kevin Liang
                                                                                                             Assistant Manager



                                                                                             Date:           September 5, 2019


                                           Technical Director

Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua NewDistrict, Shenzhen, China
Tel: +86—755—28230888                  Fax: +86—755—28230886                  E—mail: info@ultlab.com               Hitp:/www.ultlab.com


                                                               Page 2 of 10                           Report No.: 190726004RFC-2

Version
       Version No.                         Date                                                   Description
            V1.0                  September 5, 2019                                                  Original




Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China
Tel: +86-755-28230888                  Fax: +86-755-28230886                  E-mail: info@uttlab.com               Http://www.uttlab.com


                                                                         Page 3 of 10                                 Report No.: 190726004RFC-2



                                                                       CONTENTS
1.   GENERAL INFORMATION ....................................................................................................................................... 4
     1.1      CLIENT INFORMATION ........................................................................................................................................ 4
     1.2      EUT INFORMATION ............................................................................................................................................ 4
     1.3      PRODUCT SPECIFICATION SUBJECTIVE TO THIS STANDARD ................................................................................. 4
     1.4      OTHER INFORMATION ......................................................................................................................................... 4
     1.5      GENERAL DESCRIPTION OF APPLIED STANDARDS ............................................................................................... 5
     1.6      DEVIATION FROM STANDARDS ............................................................................................................................ 5
     1.7      ABNORMALITIES FROM STANDARD CONDITIONS .................................................................................................. 5
     1.8      OTHER INFORMATION REQUESTED BY THE CUSTOMER ........................................................................................ 5
2.   EQUIPMENT LIST .................................................................................................................................................... 5
3.   SAR TEST EXCLUSION EVALUATION ................................................................................................................... 6
     3.1      REFERENCE DOCUMENTS FOR EVALUATION ........................................................................................................ 6
     3.2      EXEMPTION LIMITS FOR ROUTINE EVALUATION – SAR EVALUATION .................................................................... 6
              3.2.1 SAR TEST EXCLUSION THRESHOLD ........................................................................................................ 6
              3.2.2 TEST PROCEDURE ................................................................................................................................. 8
     3.3      MPE CALCULATION RESULTS ............................................................................................................................ 8
              3.3.1 FOR BT ................................................................................................................................................. 8
APPENDIX 1 PHOTOS OF TEST SETUP ..................................................................................................................... 10
APPENDIX 1 PHOTOS OF EUT CONSTRUCTIONAL DETAILS ................................................................................. 10




Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China
Tel: +86-755-28230888                  Fax: +86-755-28230886                  E-mail: info@uttlab.com               Http://www.uttlab.com


                                                               Page 4 of 10                           Report No.: 190726004RFC-2

1. GENERAL INFORMATION
   1.1 CLIENT INFORMATION
         Applicant:                             Edifier International Limited
         Address of Applicant:                  P.O. Box 6264 General Post Office Hong Kong
         Manufacturer:                          Edifier International Limited
         Address of Manufacturer:               P.O. Box 6264 General Post Office Hong Kong


      1.2 EUT INFORMATION
         Product Name:                          True Wireless Earbuds with Active Noise Cancellation
         Model No. / HVIN:                      TWS NB
         Add. Model No. / HVIN:                 N/A
         Trade Mark:                            EDIFIER
         DUT Stage:                             Identical Prototype
                                                                              Bluetooth 5.0
         EUT Supports Function:                 2.4 GHz ISM Band:
                                                                              (LE/ 2LE/ LE Code mode is not supported)
         Sample Received Date:                  July 31, 2019
         Sample Tested Date:                    July 31, 2019 to August 14, 2019


      1.3 PRODUCT SPECIFICATION SUBJECTIVE TO THIS STANDARD
         For BT_EDR
         Frequency Band:                        2400 MHz to 2483.5 MHz
         Frequency Range:                       2402 MHz to 2480 MHz
         Bluetooth Version:                     Bluetooth BR + EDR
         Modulation Technique:                  Frequency Hopping Spread Spectrum(FHSS)
         Type of Modulation:                    GFSK, π/4DQPSK, 8DPSK
         Number of Channels:                    79
         Channel Separation:                    1 MHz
         Antenna Type:                          Monopole Antenna
                                                Right Ear                   1.1 dBi
         Antenna Gain:
                                                Left Ear                    -1.9 dBi
                                                Right Ear                   11.596 dBm
           Maximum Peak Power:
                                                Left Ear                    11.568 dBm


      1.4 OTHER INFORMATION
         Test channels for BT_EDR
                                                                                                Test RF Channel Lists
                   Mode                     Tx/Rx Frequency
                                                                               Lowest(L)              Middle(M)                  Highest(H)
                 GFSK                                                          Channel 0                Channel 39               Channel 78
                                        2402 MHz to 2480 MHz
            (DH1, DH3, DH5)                                                    2402 MHz                 2441 MHz                 2480 MHz
             π/4DQPSK                                                          Channel 0                Channel 39               Channel 78
                                        2402 MHz to 2480 MHz
         (2DH1, 2DH3, 2DH5)                                                    2402 MHz                 2441 MHz                 2480 MHz
               8DPSK                                                           Channel 0                Channel 39               Channel 78
                                        2402 MHz to 2480 MHz
         (3DH1, 3DH3, 3DH5)                                                    2402 MHz                 2441 MHz                 2480 MHz




Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China
Tel: +86-755-28230888                  Fax: +86-755-28230886                  E-mail: info@uttlab.com               Http://www.uttlab.com


                                                               Page 5 of 10                           Report No.: 190726004RFC-2

      1.5 GENERAL DESCRIPTION OF APPLIED STANDARDS

       The EUT is a RF product, according to the specifications of the manufacturers. It must comply with the
       requirements of the following standards:

       FCC 47 CFR Part 2.1093
       RSS-102 Issue 5

       All test items have been performed and recorded as per the above standards


      1.6 DEVIATION FROM STANDARDS
       None.

      1.7 ABNORMALITIES FROM STANDARD CONDITIONS
       None.

      1.8 OTHER INFORMATION REQUESTED BY THE CUSTOMER
       None.

2. EQUIPMENT LIST
       Please refer to the RF test report.




Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China
Tel: +86-755-28230888                  Fax: +86-755-28230886                  E-mail: info@uttlab.com               Http://www.uttlab.com


                                                               Page 6 of 10                           Report No.: 190726004RFC-2

3. SAR TEST EXCLUSION EVALUATION
   3.1 REFERENCE DOCUMENTS FOR EVALUATION
          No.                      Identity                                                     Document Title
            1      FCC 47 CFR Part 2.1093                       Radiofrequency radiation exposure evaluation: portable devices.
                                                                Radio    Frequency      (RF)    Exposure      Compliance      of
            2      RSS-102 Issue 5
                                                                Radiocommunication Apparatus (All Frequency Bands)
            3      KDB 447498 D01 General RF                    RF EXPOSURE PROCEDURES AND EQUIPMENT
                   Exposure Guidance v06                        AUTHORIZATION POLICIES FOR MOBILE AND PORTABLE
                                                                DEVICES


      3.2 EXEMPTION LIMITS FOR ROUTINE EVALUATION – SAR EVALUATION
      3.2.1       SAR Test Exclusion Threshold
      3.2.1.1 KDB 447498 D01 v06
                                                Appendix A
                       SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm

       Approximate SAR Test Exclusion Power Thresholds at Selected Frequencies and Test Separation
       Distances are illustrated in the following Table. The equation and threshold in 4.3.1 must be applied
       to determine SAR test exclusion.




Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China
Tel: +86-755-28230888                  Fax: +86-755-28230886                  E-mail: info@uttlab.com               Http://www.uttlab.com


                                                               Page 7 of 10                           Report No.: 190726004RFC-2




      3.2.1.2 RSS-102 Issue 5
                     Table 1: SAR evaluation – Exemption limits for routine evaluation based
                                    on frequency and separation distance4,5




       4 The exemption limits in Table 1 are based on measurements and simulations of half-wave dipole antennas at
       separation distances of 5 mm to 25 mm from a flat phantom, providing a SAR value of approximately 0.4 W/kg
       for 1 g of tissue. For low frequencies (300 MHz to 835 MHz), the exemption limits are derived from a linear fit.
       For high frequencies (1900 MHz and above), the exemption limits are derived from a third order polynomial fit.

       5 Transmitters operating between 0.003-10 MHz, meeting the exemption from routine SAR evaluation, shall
Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China
Tel: +86-755-28230888                  Fax: +86-755-28230886                  E-mail: info@uttlab.com               Http://www.uttlab.com


                                                               Page 8 of 10                           Report No.: 190726004RFC-2

       demonstrate compliance to the instantaneous limits in Section 4.

      3.2.2       Test Procedure
       Software provided by client enabled the EUT to transmit and receive data at lowest, middle and highest channel
       individually.

      3.3 MPE CALCULATION RESULTS
       Note: For the test results, the EUT had been tested with all conditions. But only the worst case was shown in
       test report.

      3.3.1       For BT
       For BT_BR & EDR function, operating at 2402MHz to 2480 MHz for GFSK, π/4 DQPSK, 8DPSK

      3.3.1.1 Antenna Type:
       Chain 0: Monopole Antenna

      3.3.1.2 Antenna Gain:
       Chain 0: 2402MHz to 2480 MHz: 1.1 dBi

      3.3.1.3 Minimum contact distance:
       The following is the product antenna location.




                                                                       BT Antenna



                                             >15mm




       The minimum contact distance is more than 15 mm. So, the 15 mm separation distance applies.




Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China
Tel: +86-755-28230888                  Fax: +86-755-28230886                  E-mail: info@uttlab.com               Http://www.uttlab.com


                                                               Page 9 of 10                           Report No.: 190726004RFC-2

      3.3.1.4 Results for FCC 47 CFR Part 2.1093
                                             Tune-up                                                                                 SAR Test
                                                                                   Maximum Tune-up                 Separation
         Operating        Frequency           Power           Tolerance                                                              Exclusion
                                                                                        Power                       Distance
          Mode                              (Average)                                                                                Threshold
                            (MHz)             (dBm)              (dBm)            (dBm)              (mW)              (mm)            (mW)
             EDR          2402-2480             7.5                2                9.5               8.91              15              29

       So the transmitter complies with the RF exposure requirements and the SAR is not required.

      3.3.1.5 Results for RSS-102 Issue 5
                                             Tune-up                                                                                 SAR Test
                                                                                   Maximum Tune-up                 Separation
         Operating        Frequency           Power           Tolerance                                                              Exclusion
                                                                                        Power                       Distance
          Mode                              (Average)                                                                                Threshold
                            (MHz)             (dBm)              (dBm)            (dBm)              (mW)              (mm)            (mW)
             EDR          2402-2480             7.5                2                9.5               8.91              15              15

       So the transmitter complies with the RF exposure requirements and the SAR is not required.




Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China
Tel: +86-755-28230888                  Fax: +86-755-28230886                  E-mail: info@uttlab.com               Http://www.uttlab.com


                                                               Page 10 of 10                          Report No.: 190726004RFC-2


      APPENDIX 1 PHOTOS OF TEST SETUP
                                                                            N/A

APPENDIX 1 PHOTOS OF EUT CONSTRUCTIONAL DETAILS

                                          Refer to Appendix 2 for EUT external and internal Photos.




                                                                 *** End of Report ***




       The test report is effective only with both signature and specialized stamp. The result(s) shown in this report refer
       only to the sample(s) tested. Without written approval of UnionTrust, this report can’t be reproduced except in full.




Shenzhen UnionTrust Quality and Technology Co., Ltd.
Address: 16/F, Block A, Building 6, Baoneng Science and Technology Park, Qingxiang Road No.1, Longhua New District, Shenzhen, China
Tel: +86-755-28230888                  Fax: +86-755-28230886                  E-mail: info@uttlab.com               Http://www.uttlab.com



Document Created: 2019-09-11 03:00:51
Document Modified: 2019-09-11 03:00:51

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