2AB5T-APEXTWS BLUETOOTH EARBUDS

Shenzhen MeiDong Acoustics Co., LTD Agent Authorization Company: Shenzhen MeiDong Acoustics Co., LTD Address: Cell B, 3th Floor, Tower B, Hongzhuyongqi Technology Park, Lezhujiao, Xixiang, Baoan, Shenzhen, Guangdong, China Product Name: TWS BLUETOOTH EARBUDS Model Number(s): COWIN Apex Product Description: TWS BLUETOOTH EARBUDS We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2020/12/30 Name: Huang ping hua Title: Manager Company: Shenzhen MeiDong Acoustics Co., LTD

Shenzhen MeiDong Acoustics Co., LTD Authorization Letter We, (the approval holder) Company name Shenzhen MeiDong Acoustics Co., LTD Addresss Cell B, 3th Floor, Tower B, Hongzhuyongqi Technology Park, Lezhujiao, Xixiang, Baoan, Shenzhen, Guangdong, China declare that the following representative (agent): Name (person) Bovey Yang Company name Shenzhen STS Test Services Co., Ltd. Addresss 1/F., Building B, Zhuoke Science Park, No.190, Chongqing Road, Fuyong Street, Bao’an District, Shenzhen, Guangdong,China City Shenzhen Country China to act on our behalf on all matters concerning the application and documents submitted to Micom Labs for product certification below Product Description TWS BLUETOOTH EARBUDS Type or Model(s) COWIN Apex Tradename or Brand(s) TWS BLUETOOTH EARBUDS Attestation: City: Date: Name: (this must be a person) Function: Signature: (or official company stamp) China 2020/12/30 Huang ping hua Manager

Shenzhen MeiDong Acoustics Co., LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2020/12/30 Subject; Request for Confidentiality FCC ID: 2AB5T-APEX To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Huang ping hua Title: Manager

Page 1 of 5 Report No.: STS2011128 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: Apex Photo 1 Photo 2 Page 2 of 5 Report No.: STS2011128 Photo 3 Photo 4 Page 3 of 5 Report No.: STS2011128 Photo 5 Photo 6 Page 4 of 5 Report No.: STS2011128 Photo 7 Photo 8 Page 5 of 5 Report No.: STS2011128 Photo 9

Label FCC ID shows on the front cover of the User Manual

Page 1 of 3 Report No.: STS2011128 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: Apex Photo 1 Photo 2 Page 2 of 3 Report No.: STS2011128 Photo 3 Photo 4 Page 3 of 3 Report No.: STS2011128 Photo 5 Photo 6 BT Antenna BT Antenna

FCC ID : 2AB5T-APEX RF EXPOSURE EVALUATION METHOD 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 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR,where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation The result is rounded to one decimal place for comparison The test exclusions are applicable only when the minimum test separation distance is ≤ 50 mm and for transmission frequencies between 100 MHz and 6 GHz. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test exclusion. FCC ID : 2AB5T-APEX Maximum measured transmitter power. BT5.0+EDR The Worst Case Mode 2402-2480MHz Detector PEAK GFSK 3.5±1dBm π/4-DQPSK 3.5±1dBm 8DPSK 3.5±1dBm Remark: The worst case gain of the antenna is 3Bi. 3Bi logarithmic terms convert to numeric result is nearly 1.995 Mode Frequen cy (GHz) Maxinum Peak Conducted Output Power (dBm) Tune up Power (dBm) Tune up Power (mW) Result Limit GFSK 2.402 4.19 4.5 2.818 0.874 3 π/4- DQPSK 2.402 4.09 4.5 2.818 0.874 3 8DPSK 2.402 4.11 4.5 2.818 0.874 3 Threshold at which no SAR required is 0.874 ≤ 3.0 for 1-g SAR, Separation distance is 5mm.

Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from STS, all test data presented in this report is only applicable to presented test sample. Shenzhen STS Test Services Co., Ltd. A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China TEL: +86-755 3688 6288 FAX: +86-755 3688 6277 E-mail:[email protected] RADIO TEST REPORT Report No.: STS2011128W02 Issued for Shenzhen MeiDong Acoustics Co., LTD Cell B, 3th Floor, Tower B, Hongzhuyongqi Technology Park, Lezhujiao, Xixiang, Baoan, Shenzhen, Guangdong, China Product Name: TWS BLUETOOTH EARBUDS Brand Name: Cowin, Meidong, Mighty Rock Model Name: COWIN Apex Series Model: N/A FCC ID: 2AB5T-APEX Test Standard: FCC Part 15.247 S T L A B S Page 2 of 75 Report No.: STS2011128W02 TEST RESULT CERTIFICATION Applicant’s Name ................... : Shenzhen MeiDong Acoustics Co., LTD Address .................................. : Cell B, 3th Floor, Tower B, Hongzhuyongqi Technology Park, Lezhujiao, Xixiang, Baoan, Shenzhen, Guangdong, China Manufacturer's Name ............. : Shenzhen MeiDong Acoustics Co., LTD Address .................................. : Cell B, 3th Floor, Tower B, Hongzhuyongqi Technology Park, Lezhujiao, Xixiang, Baoan, Shenzhen, Guangdong, China Product Description Product Name ........................ : TWS BLUETOOTH EARBUDS Brand Name ......................... : Cowin, Meidong, Mighty Rock Model Name ........................... : COWIN Apex Series Model .......................... : N/A Test Standards ....................... : FCC Part15.247 Test Procedure ....................... : ANSI C63.10-2013 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of STS, this document may be altered or revised by STS, personal only, and shall be noted in the revision of the document. Date of Test ................................ : Date of receipt of test item .......... : 07 Dec. 2020 Date (s) of performance of tests . : 07 Dec. 2020 ~ 17 Dec. 2020 Date of Issue .............................. : 18 Dec. 2020 Test Result .................................. : Pass Testing Engineer : (Chris Chen) Technical Manager : (Sean she) Authorized Signatory : (Vita Li) Page 3 of 75 Report No.: STS2011128W02 Table of Contents Page 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 FREQUENCY HOPPING SYSTEM REQUIREMENTS 10 2.4 TABLE OF PARAMETERS OF TEST SOFTWARE SETTING 12 2.5 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 12 2.6 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 13 2.7 EQUIPMENTS LIST 14 3. EMC EMISSION TEST 16 3.1 CONDUCTED EMISSION MEASUREMENT 16 3.2 RADIATED EMISSION MEASUREMENT 20 4. CONDUCTED SPURIOUS & BAND EDGE EMISSION 32 4.1 LIMIT 32 4.2 TEST PROCEDURE 32 4.3 TEST SETUP 33 4.4 EUT OPERATION CONDITIONS 33 4.5 TEST RESULTS 34 5. NUMBER OF HOPPING CHANNEL 49 5.1 LIMIT 49 5.2 TEST PROCEDURE 49 5.3 TEST SETUP 49 5.4 EUT OPERATION CONDITIONS 49 5.5 TEST RESULTS 50 6. AVERAGE TIME OF OCCUPANCY 51 6.1 LIMIT 51 6.2 TEST PROCEDURE 51 6.3 TEST SETUP 51 6.4 EUT OPERATION CONDITIONS 51 6.5 TEST RESULTS 52 7. HOPPING CHANNEL SEPARATION MEASUREMEN 58 Page 4 of 75 Report No.: STS2011128W02 Table of Contents Page 7.1 LIMIT 58 7.2 TEST PROCEDURE 58 7.3 TEST SETUP 58 7.4 EUT OPERATION CONDITIONS 58 7.5 TEST RESULTS 59 8. BANDWIDTH TEST 65 8.1 LIMIT 65 8.2 TEST PROCEDURE 65 8.3 TEST SETUP 65 8.4 EUT OPERATION CONDITIONS 65 8.5 TEST RESULTS 66 9. OUTPUT POWER TEST 72 9.1 LIMIT 72 9.2 TEST PROCEDURE 72 9.3 TEST SETUP 72 9.4 EUT OPERATION CONDITIONS 72 9.5 TEST RESULTS 73 10. ANTENNA REQUIREMENT 74 10.1 STANDARD REQUIREMENT 74 10.2 EUT ANTENNA 74 Page 5 of 75 Report No.: STS2011128W02 Revision History Rev. Issue Date Report NO. Effect Page Contents 00 18 Dec. 2020 STS2011128W02 ALL Initial Issue Page 6 of 75 Report No.: STS2011128W02 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247(a)(1) Hopping Channel Separation PASS -- 15.247(a)(1)&(b)(1) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247(d) Conducted Spurious & Band Edge Emission PASS -- 15.247(a)(1)(iii) Number of Hopping Frequency PASS -- 15.247(a)(1)(iii) Dwell Time PASS -- 15.247(a)(1) Bandwidth PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2013. Page 7 of 75 Report No.: STS2011128W02 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ±U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±0.68dB 2 Unwanted Emissions, conducted ±2.988dB 3 All emissions, radiated 30-1GHz ±4.39dB 4 All emissions, radiated 1G-6GHz ±5.10dB 5 All emissions, radiated>6G ±5.48dB 6 Conducted Emission (9KHz-150KHz) ±2.79dB 7 Conducted Emission (150KHz-30MHz) ±2.80dB Page 8 of 75 Report No.:…

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Page 1 of 2 FCC ID: 2AB5T-APEX DSS Setup photo Model name: COWIN Apex DSS conduction DSS radiation L Page 2 of 2 FCC ID: 2AB5T-APEX DSS radiation H