2ADYY-A2SEWireless Earphone

TECNO MOBILE LIMITED Agent Authorization Letter (October 12, 2020) Eurofins MET Labs 914 West Patapsco Avenue Baltimore, MD 21230 RE: LETTER OF AGENT AUTHORIZATION To Whom It May Concern: We, the undersigned, hereby authorize (Shenzhen Tongzhou Testing Co.,Ltd.) to act on our behalf in all matters relating to application for equipment authorization, including the signing of all documents relating to these matters. We also hereby certify that no party to the application authorized hereunder is subject to the denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C.853(a). This agreement expires one year from the current date. Sincerely, Yiting,Luo / Certified Engineer

TECNO MOBILE LIMITED Long Term Confidentiality Request Letter (October 12, 2020) Eurofins MET Labs 914 West Patapsco Avenue Baltimore, MD 21230 RE: CONFIDENTIALITY REQUEST FOR (Wireless Earphone /A2 se # 2ADYY-A2SE#) To Whom It May Concern: This letter serves as an official request for confidentiality under sections 0.457 and 0.459 of CFR 47. We have requested that the - Block Diagram - Schematics - Operational Description - BOM required to be submitted with this application be permanently withheld from public review. The above-mentioned documents belong to internal documents, is our proprietary information, that could never get into the possession of our competition. Please contact me if there is any information you may need. Sincerely, Client’s name / title : Yiting,Luo / Certified Engineer Company Name: TECNO MOBILE LIMITED Contact information / address: [email protected] / ROOM 604 6/F SOUTH TOWER WORLD FINANCE CTR HARBOUR CITY 17 CANTON ROAD TST KL

TECNO MOBILE LIMITED Short Term Confidentiality Request Letter (October 12, 2020) MET Laboratories, Inc. 914 West Patapsco Avenue Baltimore, MD 21230 RE: Short Term Confidentiality Request For(Wireless Earphone /A2 se# 2ADYY-A2SE#) To Whom It May Concern: In accordance with sections 0.457 and 0.459 of CFR 47, <TECNO MOBILE LIMITED. >. requests short-term Confidentiality of following sections of this application for a period of 45 days after grant is issued. Test setup photos External photos Internal photos User’s manual These documents contain detailed system and equipment descriptions and related information about the product, which < TECNO MOBILE LIMITED. > considers to be proprietary, confidential, and a custom design and otherwise, would not release to the general public. Since this design is a basis from which future technological products will evolve, <TECNO MOBILE LIMITED.> feels that this information would be of benefit to its competitors, and that the disclosure of the information in these documents would give our competitors an unfair advantage in the market. Please contact me if there is any information you may need. Sincerely, Name: Yiting,Luo Function: Certified Engineer Signature:

Label Location: FCC ID: 2ADYY-A2SE Model: A2 se Capacity: 100mA/0.37Wh MADE IN CHINA

Internal photograph of EUT Internal photograph of EUT Internal photograph of EUT Internal photograph of EUT BT ATN Internal photograph of EUT Internal photograph of EUT Internal photograph of EUT Internal photograph of EUT

Antenna Describe 1： Antenna Describe Antenna PCB Antenna Gain 0dBi Frequency Range 2.4Ghz‐2.483Ghz Connector Type Direct Location of mearement(company name) SHENZHENSHIXINZHONGXIN TECHNOLOGY.CO.,LTD 2：External View Drawing Picture of antenna 3：Measurement Result 3.1 Return Loss (S11 ) 3.2 Smith Chart 3.3 Gain

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY- A2SE RADIO FREQUENCY EXPOSURE Limit According to section 4.3.1 of KDB 447498 D01 General RF Exposure Guidance v06, SAR evaluation is required if the separation distance between the user and/or bystander and the antenna and/or radiating element of the device is less than or equal to 20 cm, except when the device operates at or below the applicable output power level (adjusted for tune-up tolerance) for the specified separation distance defined in Appendix A. Appendix A SAR Test Exclusion Thresholds for 100 MHz – 6 GHz and ≤ 50 mm MHz 5 10 15 20 25 mm 150 39 77 116 155 194 SAR Test Exclusion Threshold (mW) 300 27 55 82 110 137 450 22 45 67 89 112 835 16 33 49 66 82 900 16 32 47 63 79 1500 12 24 37 49 61 1900 11 22 33 44 54 2450 10 19 29 38 48 3600 8 16 24 32 40 5200 7 13 20 26 33 5400 6 13 19 26 32 5800 6 12 19 25 31 MHz 30 35 40 45 50 mm 150 232 271 310 349 387 SAR Test Exclusion Threshold (mW) 300 164 192 219 246 274 450 134 157 179 201 224 835 98 115 131 148 164 900 95 111 126 142 158 1500 73 86 98 110 122 1900 65 76 87 98 109 2450 57 67 77 86 96 3600 47 55 63 71 79 5200 39 46 53 59 66 5400 39 45 52 58 65 5800 37 44 50 56 62 Note: Manufacturer declared that the maximum antenna gain is 0dBi (Max.). This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 2 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY- A2SE Conducted Power Results Test Mode Channel Frequency (MHz) Measured Peak Output Power (dBm) GFSK 00 2402 -0.39 39 2441 -1.30 78 2480 -2.43 π/4-DQPSK 00 2402 0.94 39 2441 1.14 78 2480 0.05 8-DPSK 00 2402 1.32 39 2441 0.56 78 2480 -0.51 Manufacturing tolerance GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.5 0.5 Tolerance ±(dB) 1.0 1.0 1.0 π/4-DQPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 0.0 0.0 0.0 Tolerance ±(dB) 1.0 1.0 1.0 8-DPSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) 1.0 1.0 1.0 Tolerance ±(dB) 1.0 1.0 1.0 Results Test Mode Channel Frequency (MHz) Max. Tune Up Power (dBm, Peak) Max. Eirp including Tune Up (dBm, Peak) Max. Eirp including Tune Up (mW, Peak) Exemption Limit (mW) GFSK 2402 1.0 1.0 1.23 10 2441 1.0 1.0 1.23 10 2480 1.0 1.0 1.23 10 π/4-DQPSK 2402 1.0 1.0 1.23 10 2441 1.0 1.0 1.23 10 2480 1.0 1.0 1.23 10 8-DPSK 2402 1.5 1.5 1.52 10 2441 1.5 1.5 1.52 10 2480 1.5 1.5 1.52 10 The antenna gain of the EUT for BT is 0dBi (Max). the Maximum Eirp is used for Routine Evaluation Exemption according to section 4.3.1 of KDB 447498 D01. So, the SAR evaluation is not required. This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 2 of 2

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 1 of 24 Appendix A RF Test Data for BT(BDR/EDR) (Conducted Measurement) Product Name: Wireless Earphone Trade Mark: TECNO Test Model: A2 se FCC ID: 2ADYY-A2SE Environmental Conditions Temperature: 22.8 C Relative Humidity: 56% ATM Pressure: 100.0 kPa Test Engineer: Nancy Li Supervised by: Hugo Chen A.1 20 dB Bandwidth TestMode Antenna Channel 20db EBW[MHz] FL[MHz] FH[MHz] Limit[MHz] Verdict DH5 Ant1 2402 1.029 2401.481 2402.077 --- PASS 2441 1.029 2440.481 2441.077 --- PASS 2480 1.029 2479.481 2480.077 --- PASS 2DH5 Ant1 2402 1.365 2401.332 2401.832 --- PASS 2441 1.361 2440.337 2440.832 --- PASS 2480 1.361 2479.337 2479.837 --- PASS 3DH5 Ant1 2402 1.351 2401.337 2402.394 --- PASS 2441 1.346 2440.341 2441.139 --- PASS 2480 1.346 2479.341 2480.120 --- PASS Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 2 of 24 Test Graph Ref 30 dBmAtt 30 dB** * * 1 PK VIEW A TDF 3DB RBW 30 kHz VBW 100 kHz SWT 15 ms* Center2.402 GHzSpan3 MHz300 kHz/ -70 -60 -50 -40 -30 -20 -10 0 10 20 30 1 Marker 1 [T1 ] -23.65 dBm 2.401480769 GHz 2 Marker 2 [T1 ] -3.54 dBm 2.402076923 GHz 1 Delta 1 [T1 ] 0.44 dB 1.028846154 MHz D1 -23.54 dBm Date: 28.SEP.2020 20:24:16 DH5_Ant1_2402 Ref 30 dBmAtt 30 dB** * * 1 PK VIEW A TDF 3DB RBW 30 kHz VBW 100 kHz SWT 15 ms* Center2.441 GHzSpan3 MHz300 kHz/ -70 -60 -50 -40 -30 -20 -10 0 10 20 30 1 Marker 1 [T1 ] -24.42 dBm 2.440480769 GHz 2 Marker 2 [T1 ] -4.37 dBm 2.441076923 GHz 1 Delta 1 [T1 ] -0.03 dB 1.028846154 MHz D1 -24.37 dBm Date: 28.SEP.2020 20:25:52 DH5_Ant1_2441 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 3 of 24 Ref 30 dBmAtt 30 dB** * * 1 PK VIEW A TDF 3DB RBW 30 kHz VBW 100 kHz SWT 15 ms* Center2.48 GHzSpan3 MHz300 kHz/ -70 -60 -50 -40 -30 -20 -10 0 10 20 30 1 Marker 1 [T1 ] -25.76 dBm 2.479480769 GHz 2 Marker 2 [T1 ] -5.55 dBm 2.480076923 GHz 1 Delta 1 [T1 ] 0.23 dB 1.028846154 MHz D1 -25.55 dBm Date: 28.SEP.2020 20:26:54 DH5_Ant1_2480 Ref 30 dBmAtt 30 dB** * * 1 PK VIEW A TDF 3DB RBW 30 kHz VBW 100 kHz SWT 15 ms* Center2.402 GHzSpan3 MHz300 kHz/ -70 -60 -50 -40 -30 -20 -10 0 10 20 30 1 Marker 1 [T1 ] -27.28 dBm 2.401331731 GHz 2 Marker 2 [T1 ] -6.71 dBm 2.401831731 GHz 1 Delta 1 [T1 ] 0.54 dB 1.365384615 MHz D1 -26.71 dBm Date: 28.SEP.2020 20:30:48 2DH5_Ant1_2402 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 4 of 24 Ref 30 dBmAtt 30 dB** * * 1 PK VIEW A TDF 3DB RBW 30 kHz VBW 100 kHz SWT 15 ms* Center2.441 GHzSpan3 MHz300 kHz/ -70 -60 -50 -40 -30 -20 -10 0 10 20 30 1 Marker 1 [T1 ] -27.39 dBm 2.440336538 GHz 2 Marker 2 [T1 ] -7.60 dBm 2.440831731 GHz 1 Delta 1 [T1 ] -0.05 dB 1.360576923 MHz D1 -27.6 dBm Date: 28.SEP.2020 20:29:20 2DH5_Ant1_2441 Ref 30 dBmAtt 30 dB** * * 1 PK VIEW A TDF 3DB RBW 30 kHz VBW 100 kHz SWT 15 ms* Center2.48 GHzSpan3 MHz300 kHz/ -70 -60 -50 -40 -30 -20 -10 0 10 20 30 1 Marker 1 [T1 ] -28.85 dBm 2.479336538 GHz 2 Marker 2 [T1 ] -8.66 dBm 2.479836538 GHz 1 Delta 1 [T1 ] 0.33 dB 1.360576923 MHz D1 -28.66 dBm Date: 28.SEP.2020 20:27:49 2DH5_Ant1_2480 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 5 of 24 Ref 30 dBmAtt 30 dB** * * 1 PK VIEW A TDF 3DB RBW 30 kHz VBW 100 kHz SWT 15 ms* Center2.402 GHzSpan3 MHz300 kHz/ -70 -60 -50 -40 -30 -20 -10 0 10 20 30 1 Marker 1 [T1 ] -27.06 dBm 2.401336538 GHz 2 Marker 2 [T1 ] -6.52 dBm 2.402139423 GHz 1 Delta 1 [T1 ] 0.06 dB 1.350961538 MHz D1 -26.52 dBm Date: 28.SEP.2020 20:32:01 3DH5_Ant1_2402 Ref 30 dBmAtt 30 dB** * * 1 PK VIEW A TDF 3DB RBW 30 kHz VBW 100 kHz SWT 15 ms* Center2.441 GHzSpan3 MHz300 kHz/ -70 -60 -50 -40 -30 -20 -10 0 10 20 30 1 Marker 1 [T1 ] -26.79 dBm 2.440341346 GHz 2 Marker 2 [T1 ] -7.40 dBm 2.441139423 GHz 1 Delta 1 [T1 ] -0.98 dB 1.346153846 MHz D1 -27.4 dBm Date: 28.SEP.2020 20:33:05 3DH5_Ant1_2441 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 6 of 24 Ref 30 dBmAtt 30 dB** * * 1 PK VIEW A TDF 3DB RBW 30 kHz VBW 100 kHz SWT 15 ms* Center2.48 GHzSpan3 MHz300 kHz/ -70 -60 -50 -40 -30 -20 -10 0 10 20 30 1 Marker 1 [T1 ] -27.98 dBm 2.479341346 GHz 2 Marker 2 [T1 ] -8.54 dBm 2.480120192 GHz 1 Delta 1 [T1 ] -0.71 dB 1.346153846 MHz D1 -28.54 dBm Date: 28.SEP.2020 20:36:18 3DH5_Ant1_2480 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 7 of 24 A.2 Dwell Time TestMode Antenna Channel BurstWidth [ms] TotalHops [Num] Result[s] Limit[s] Verdict DH5 Ant1 Hop 2.935 106.7 0.313 <=0.4 PASS 2DH5 Ant1 Hop 2.935 106.7 0.313 <=0.4 PASS 3DH5 Ant1 Hop 2.936 106.7 0.313 <=0.4 PASS Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 8 of 24 Test Graph Ref 10 dBmAtt 30 dB* * * Center 2.441 GHz1 ms/ 1 RM VIEW A TDF 3DB RBW 500 kHz VBW 2 MHz SWT 10 ms -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 1 Marker 1 [T1 ] -1.30 dBm 1.618000 ms ndB [T1] 35.00 dB PWIDTH 2.934500 ms T1 Temp 1 [T1 ndB] -44.65 dBm 1.611000 ms T2 Temp 2 [T1 ndB] -37.82 dBm 4.545500 ms Date: 28.SEP.2020 20:02:45 DH5_Ant1_Hop Ref 10 dBmAtt 30 dB* * * Center 2.441 GHz1 ms/ 1 RM VIEW A TDF 3DB RBW 500 kHz VBW 2 MHz SWT 10 ms -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 1 Marker 1 [T1 ] -1.13 dBm 5.205000 ms ndB [T1] 35.00 dB PWIDTH 2.934500 ms T1 Temp 1 [T1 ndB] -34.50 dBm 5.099500 ms T2 Temp 2 [T1 ndB] -31.57 dBm 8.034000 ms Date: 28.SEP.2020 20:04:58 2DH5_Ant1_Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 9 of 24 Ref 10 dBmAtt 30 dB* * * Center 2.441 GHz1 ms/ 1 RM VIEW A TDF 3DB RBW 500 kHz VBW 2 MHz SWT 10 ms -90 -80 -70 -60 -50 -40 -30 -20 -10 0 10 1 Marker 1 [T1 ] -0.80 dBm 6.252000 ms ndB [T1] 35.00 dB PWIDTH 2.936000 ms T1 Temp 1 [T1 ndB] -34.13 dBm 6.206500 ms T2 Temp 2 [T1 ndB] -33.74 dBm 9.142500 ms Date: 28.SEP.2020 20:07:27 3DH5_Ant1_Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ADYY-A2SE Report No.: TZ201001747-E2 Page 10 of 24 A.3 Carrier Frequency Separat…

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Report No.: TZ201001747-E2 Page 1 of 37 FCC TEST REPORT Test report On Behalf of TECNO MOBILE LIMITED For Wireless Earphone Model No: A2 se FCC ID: 2ADYY-A2SE Prepared for : TECNO MOBILE LIMITED ROOM 604 6/F SOUTH TOWER WORLD FINANCE CTR HARBOUR CITY 17 CANTON ROAD TST KL Prepared By : Shenzhen Tongzhou Testing Co.,Ltd 1th Floor, Building 1, Haomai High-tech Park, Huating Road 387, Dalang Street, Longhua, Shenzhen, China Date of Test: 2020/9/27 – 2020/9/29 Date of Report: 2020/10/20 Report Number: TZ201001747-E2 The test report apply only to the specific sample(s) tested under stated test conditions It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Report No.: TZ201001747-E2 Page 2 of 37 TEST RESULT CERTIFICATION Applicant’s name ................. : TECNO MOBILE LIMITED Address .................................. : ROOM 604 6/F SOUTH TOWER WORLD FINANCE CTR HARBOUR CITY 17 CANTON ROAD TST KL Manufacture's Name ............ : TECNO MOBILE LIMITED Address .................................. : ROOM 604 6/F SOUTH TOWER WORLD FINANCE CTR HARBOUR CITY 17 CANTON ROAD TST KL Product description Trade Mark ............................. : TECNO Product name ........................... : Wireless Earphone Model No ................................ : A2 se Standards ............................. : FCC Rules and Regulations Part 15 Subpart C Section 15.247 ANSI C63.10: 2013 This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Tongzhou Testing Co.,Ltd is acknowledged as copyright owner and source of the material. Shenzhen Tongzhou Testing Co.,Ltd takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context. Date of Test ............................. ........... : Date (s) of performance of tests ........... : 2020/9/27- 2020/9/29 Date of Issue ......................................... : 2020/10/20 Test Result ............................................ : PASS Testing Engineer : (Nancy Li) Technical Manager : (Hugo Chen) Authorized Signatory : (Andy Zhang) Report No.: TZ201001747-E2 Page 3 of 37 Revision History Revision Issue Date Revisions Revised By 00 2020/10/20 Initial Issue Andy Zhang Report No.: TZ201001747-E2 Page 4 of 37 TABLE OF CONTENTS Description Page 1. GENERAL INFORMATION ................................................................................................................ 5 1.1. Description of Device (EUT) ................................................................................................................... 5 1.2 Support equipment List ................................................................................................................................ 5 1.3 EUT configuration ......................................................................................................................................... 5 The following peripheral devices and interface cables were connected during the measurement: ....... 5 1.4 External I/O Cable ........................................................................................................................................ 5 1.5 Description of Test Facility .......................................................................................................................... 6 1.6 Statement of the Measurement Uncertainty ............................................................................................. 7 1.7 Measurement Uncertainty ........................................................................................................................... 7 1.8 Description of Test Modes .......................................................................................................................... 7 2. TEST METHODOLOGY ...................................................................................................................... 8 2.1 EUT Configuration ........................................................................................................................................ 8 2.2 EUT Exercise ................................................................................................................................................ 8 2.3 General Test Procedures ............................................................................................................................ 8 2.4. Test Sample ................................................................................................................................................. 8 3. SYSTEM TEST CONFIGURATION .................................................................................................. 9 3.1 Justification .................................................................................................................................................... 9 3.2 EUT Exercise Software ............................................................................................................................... 9 3.3 Special Accessories ..................................................................................................................................... 9 3.4 Block Diagram/Schematics ......................................................................................................................... 9 3.5 Equipment Modifications ............................................................................................................................. 9 3.6 Test Setup ..................................................................................................................................................... 9 4. SUMMARY OF TEST RESULTS ..................................................................................................... 10 5. SUMMARY OF TEST EQUIPMENT .................................................................…

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RADIATED EMISSION TEST RADIATED EMISSION TEST RADIATED EMISSION TEST