2AMNQTWS16TWS Earphones

Jan. 15, 2020 Federal Communications Commission 445 12 th Street SW Washington, DC 20554 Subject: Limited Agency Agreement Dongguan UiiSii Electronics Co., Ltd FCC ID: 2AMNQTWS16 To Whom It May Concern: We, Dongguan UiiSii Electronics Co., Ltd hereby authorized Intertek Testing Services to act as our Agent for the purpose of preparing application for FCC ID number 2AMNQTWS16) under all applicable parts of the FCC rules and regulations. The effective date of this limited agency agreement is (2020-01-25). The Limited Agency Agreement expires until further notice, unless sooner terminated or extended by written notice to Intertek Testing Services and the Federal Communications Commission. This is to advise that we are in full compliance with the Anti-Drug Abuse Act. The applicant is not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 U.S.C. 862, and no party to the application is subject to a denial of federal benefits pursuant to that section. If you have any questions or comments, please do not hesitate to contact me. Sincerely, [Signature] Dongguan UiiSii Electronics Co., Ltd Contact person: Yongguo Wu

Jan. 15, 2020 Federal Communication Commission Authorization and Evaluation Division FCC ID: 2AMNQTWS16 Re: Confidentiality Request Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, the applicant hereby requests confidential treatment of information applied this application as outlined below: 1: Block Diagram 2: Schematics 3: Operational Description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the applicant and provide unjustified benefits to its competitors. The Applicant understands that pursuant to Rules 0.457, disclosure of this Application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Dongguan UiiSii Electronics Co., Ltd Contact person: Yongguo Wu

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FCC ID Label Location 7mm*18mm FCC ID: 2AMNQTWS16

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RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description TWS Earphones Model Name TWS16 FCC ID 2AMNQTWS16 2. EVALUATION METHOD According to 447498 D01 General RF Exposure Guidance v05 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 3. CALCULATION BLE: P t =-5.337dBm=0.29mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(0.29mW /5mm) .[√2.48(GHz)]= 0.09<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. BR/EDR: P t =-2.004dBm=0.63mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(0.63mW /5mm) .[√2.48(GHz)]= 0.20<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. 4. CONCLUSION The SAR evaluation is not required.

Page 1 of 45 FCC Test Report Report No.: AGC02324191201FE02 FCC ID : 2AMNQTWS16 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : TWS Earphones BRAND NAME : UiiSii MODEL NAME : TWS16 CLIENT : Dongguan UiiSii Electronics Co., Ltd DATE OF ISSUE : Jan. 14, 2020 STANDARD(S) : FCC Part 15.247 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd CAUTION: This report shall not be reproduced except in full without the written permission of the test laboratory and shall not be quoted out of context. Report No.: AGC02324191201FE02 Page 2 of 45 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Jan. 14, 2020 Valid Initial Release Report No.: AGC02324191201FE02 Page 3 of 45 TABLE OF CONTENTS 1. VERIFICATION OF COMPLIANCE ............................................................................................................... 5 2.GENERAL INFORMATION ............................................................................................................................. 6 2.1PRODUCT DESCRIPTION ........................................................................................................................ 6 2.2. TABLE OF CARRIER FREQUENCYS ..................................................................................................... 6 2.3 RELATED SUBMITTAL(S)/GRANT(S) ..................................................................................................... 7 2.4TEST METHODOLOGY ............................................................................................................................ 7 2.5 SPECIAL ACCESSORIES ........................................................................................................................ 7 2.6 EQUIPMENT MODIFICATIONS ............................................................................................................... 7 3. MEASUREMENT UNCERTAINTY ................................................................................................................. 8 4. DESCRIPTION OF TEST MODES ................................................................................................................. 9 5. SYSTEM TEST CONFIGURATION ............................................................................................................. 10 5.1 CONFIGURATION OF TESTED SYSTEM .............................................................................................. 10 5.2 EQUIPMENT USED IN TESTED SYSTEM ............................................................................................. 10 5.3. SUMMARY OF TEST RESULTS ............................................................................................................ 10 6. TEST FACILITY ........................................................................................................................................... 11 7. PEAK OUTPUT POWER ............................................................................................................................. 12 7.1. MEASUREMENT PROCEDURE ........................................................................................................... 12 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................. 12 7.3. LIMITS AND MEASUREMENT RESULT ............................................................................................... 13 8. 6 DB BANDWIDTH ...................................................................................................................................... 15 8.1. MEASUREMENT PROCEDURE ........................................................................................................... 15 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................. 15 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................. 15 9. CONDUCTED SPURIOUS EMISSION ........................................................................................................ 17 9.1. MEASUREMENT PROCEDURE ........................................................................................................... 17 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) .................................................................. 17 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................. 17 9.4. LIMITS AND MEASUREMENT RESULT ............................................................................................... 17 10. MAXIMUM CONDUCTED OUTPUT POWER SPECTRAL DENSITY ....................................................... 22 Report No.: AGC02324191201FE02 Page 4 of 45 10.1 MEASUREMENT PROCEDURE .......................................................................................................... 22 10.2 TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................. 22 10.3 MEASUREMENT EQUIPMENT USED ................................................................................................. 22 10.4 LIMITS AND MEASUREMENT RESULT .............................................................................................. 22 11. RADIATED EMISSION ............................................................................................................................... 24 11.1. MEASUREMENT PROCEDURE ......................................................................................................... 24 11.2. TEST SETUP ....................................................................................................................................... 25 11.3. LIMITS AND MEASUREMENT RESULT ............................................................................................. 26 11.4. TEST RESULT ................................................................…

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Test Setup Photos RADIATED EMISSION TEST SETUP BELOW 1GHZ RADIATED EMISSION TEST SETUP ABOVE 1GHZ