2ARPHTS-T3True wireless stereo earbuds

FCC ID: 2ARPHTS-T3 NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: - Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver. -Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -Consult the dealer or an experienced radio/TV technician for help Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

TUOSI ELECTRONICS CO.,LTD. Room259, 2/F, Liangji building, Donghuan One RD, Longhua district, Shenzhen, China Jan. 08, 2020 Federal Communications Commission 445 12 th Street SW Washington, DC 20554 Subject: Limited Agency Agreement TUOSI ELECTRONICS CO.,LTD. FCC ID: 2ARPHTS-T3 To Whom It May Concern: We, TUOSI ELECTRONICS CO.,LTD. hereby authorized Intertek Testing Services to act as our Agent for the purpose of preparing application for FCC ID number 2ARPHTS-T3) under all applicable parts of the FCC rules and regulations. The effective date of this limited agency agreement is (2020-01-13). 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] TUOSI ELECTRONICS CO.,LTD. Contact person: Hua Lin

External Photos TOTAL VIEW OF EUT Headset TOP VIEW OF EUT BOTTOM VIEW OF EUT FRONT VIEW OF EUT BACK VIEW OF EUT LEFT VIEW OF EUT RIGHT VIEW OF EUT VIEW OF EUT(PORT) Charging Dock TOP VIEW OF EUT BOTTOM VIEW OF EUT FRONT VIEW OF EUT BACK VIEW OF EUT LEFT VIEW OF EUT RIGHT VIEW OF EUT

FCC ID Label Location 12mm*10mm FCC ID: 2ARPHTS-T3

Internal Photos Left OPEN VIEW OF EUT VIEW OF BATTERY INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 BT Antenna INTERNAL VIEW OF EUT-3 Right OPEN VIEW OF EUT VIEW OF BATTERY INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 BT Antenna Charging Dock VIEW OF EUT(PORT)-1 VIEW OF EUT(PORT)-2 OPEN VIEW OF EUT VIEW OF BATTERY INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description True wireless stereo earbuds Model Name TS-T3, V80, V90 FCC ID 2ARPHTS-T3 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 P t =2.684dBm=1.86mW 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=(1.86mW /5mm) .[√2.480(GHz)]= 0.58<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 74 FCC Test Report Report No.: AGC04508191201FE03 FCC ID : 2ARPHTS-T3 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : True wireless stereo earbuds BRAND NAME : N/A MODEL NAME : TS-T3, V80, V90 APPLICANT : TUOSI ELECTRONICS CO., LTD. DATE OF ISSUE : Jan. 07, 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.: AGC04508191201FE03 Page 2 of 74 REPORT REVISE RECORD Report Version Revise Time Issued Date Valid Version Notes V1.0 / Jan. 07, 2020 Valid Initial Release Report No.: AGC04508191201FE03 Page 3 of 74 TABLE OF CONTENTS 1. VERIFICATION OF CONFORMITY ............................................................................................................... 5 2. GENERAL INFORMATION ............................................................................................................................ 6 2.1. PRODUCT DESCRIPTION ..................................................................................................................... 6 2.2. TABLE OF CARRIER FREQUENCYS ..................................................................................................... 6 2.3. RECEIVER INPUT BANDWIDTH ............................................................................................................ 7 2.4. EXAMPLE OF A HOPPING SEQUENCY IN DATA MODE ....................................................................... 7 2.5. EQUALLY AVERAGE USE OF FREQUENCIES AND BEHAVIOUR ........................................................ 7 2.6. RELATED SUBMITTAL(S) / GRANT (S) .................................................................................................. 8 2.7. TEST METHODOLOGY .......................................................................................................................... 8 2.8. SPECIAL ACCESSORIES ....................................................................................................................... 8 2.9. EQUIPMENT MODIFICATIONS .............................................................................................................. 8 3. MEASUREMENT UNCERTAINTY ................................................................................................................. 9 4. DESCRIPTION OF TEST MODES ............................................................................................................... 10 5. SYSTEM TEST CONFIGURATION .............................................................................................................. 11 5.1. CONFIGURATION OF EUT SYSTEM .................................................................................................... 11 5.2. EQUIPMENT USED IN TESTED SYSTEM ............................................................................................. 11 5.3. SUMMARY OF TEST RESULTS ............................................................................................................. 11 6. TEST FACILITY ........................................................................................................................................... 12 7. PEAK OUTPUT POWER ............................................................................................................................. 13 7.1. MEASUREMENT PROCEDURE ........................................................................................................... 13 7.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................... 13 7.3. LIMITS AND MEASUREMENT RESULT ............................................................................................... 14 8. 20DB BANDWIDTH ..................................................................................................................................... 20 8.1. MEASUREMENT PROCEDURE ........................................................................................................... 20 8.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................... 20 8.3. LIMITS AND MEASUREMENT RESULTS ............................................................................................. 20 9. CONDUCTED SPURIOUS EMISSION ........................................................................................................ 27 9.1. MEASUREMENT PROCEDURE ........................................................................................................... 27 9.2. TEST SET-UP (BLOCK DIAGRAM OF CONFIGURATION) ................................................................... 27 Report No.: AGC04508191201FE03 Page 4 of 74 9.3. MEASUREMENT EQUIPMENT USED .................................................................................................. 27 9.4. LIMITS AND MEASUREMENT RESULT ............................................................................................... 27 10. RADIATED EMISSION ............................................................................................................................... 37 10.1. MEASUREMENT PROCEDURE ......................................................................................................... 37 10.2. TEST SETUP ....................................................................................................................................... 39 10.3. LIMITS AND MEASUREMENT RESULT ............................................................................................. 40 10.4. TEST RESULT ..................................................................................................................................... 40 11. NUMBER OF HOPPING FREQUENCY ..................................................................................................... 50 11.1. MEASUREMENT PROCE…

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Report No.: AGC04508191201FE03 Page 53 of 74 TEST PLOT OF MIDDLE CHANNEL Report No.: AGC04508191201FE03 Page 54 of 74 TEST PLOT OF HIGH CHANNEL Report No.: AGC04508191201FE03 Page 55 of 74 13. FREQUENCY SEPARATION 13.1. MEASUREMENT PROCEDURE The EUT shall have its hopping function enabled. Use the following spectrum analyzer settings: 1. Span: Wide enough to capture the peaks of two adjacent channels. 2. RBW: Start with the RBW set to approximately 30% of the channel spacing; adjust as necessary to best identify the center of each individual channel. 3. Video (or average) bandwidth (VBW) ≥ RBW. 4. Sweep: Auto. e) Detector function: Peak. f) Trace: Max hold. g) Allow the trace to stabilize. Use the marker-delta function to determine the separation between the peaks of the adjacent channels. 13.2. TEST SETUP (BLOCK DIAGRAM OF CONFIGURATION) Same as described in section 6.2 13.3. MEASUREMENT EQUIPMENT USED The same as described in section 6.3 13.4. LIMITS AND MEASUREMENT RESULT CHANNEL CHANNEL SEPARATION KHz LIMIT (KHz) RESULT CH01-CH02 1000 >=25 KHz or 2/3 20 dB BW PASS TEST PLOT FOR FREQUENCY SEPARATION Note: The 8DPSK modulation is the worst case and recorded in the report. Report No.: AGC04508191201FE03 Page 56 of 74 14. FCC LINE CONDUCTED EMISSION TEST 14.1. LIMITS OF LINE CONDUCTED EMISSION TEST Frequency Maximum RF Line Voltage Q.P.( dBuV) Average( dBuV) 150kHz~500kHz 66-56 56-46 500kHz~5MHz 56 46 5MHz~30MHz 60 50 Note: 1. The lower limit shall apply at the transition frequency. 2. The limit decreases linearly with the logarithm of the frequency in the range 0.15 MHz to 0.50 MHz. 14.2. BLOCK DIAGRAM OF LINE CONDUCTED EMISSION TEST EUT & Support Units Report No.: AGC04508191201FE03 Page 57 of 74 14.3. PRELIMINARY PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. The equipment was set up as per the test configuration to simulate typical actual usage per the user’s manual. When the EUT is a tabletop system, a wooden table with a height of 0.8 meters is used and is placed on the ground plane as per ANSI C63.10 (see Test Facility for the dimensions of the ground plane used). When the EUT is a floor-standing equipment, it is placed on the ground plane which has a 3-12 mm non-conductive covering to insulate the EUT from the ground plane. 2. Support equipment, if needed, was placed as per ANSI C63.10. 3. All I/O cables were positioned to simulate typical actual usage as per ANSI C63.10. 4. All support equipments received AC120V/60Hz power from a LISN, if any. 5. The EUT received DC charging voltage by adapter which received AC120V/60Hz power by a LISN. 6. The test program was started. Emissions were measured on each current carrying line of the EUT using a spectrum Analyzer / Receiver connected to the LISN powering the EUT. The LISN has two monitoring points: Line 1 (Hot Side) and Line 2 (Neutral Side). Two scans were taken: one with Line 1 connected to Analyzer / Receiver and Line 2 connected to a 50 ohm load; the second scan had Line 1 connected to a 50 ohm load and Line 2 connected to the Analyzer / Receiver. 7. Analyzer / Receiver scanned from 150 kHz to 30MHz for emissions in each of the test modes. 8. During the above scans, the emissions were maximized by cable manipulation. 9. The test mode(s) were scanned during the preliminary test. Then, the EUT configuration and cable configuration of the above highest emission level were recorded for reference of final testing. 14.4. FINAL PROCEDURE OF LINE CONDUCTED EMISSION TEST 1. EUT and support equipment was set up on the test bench as per step 2 of the preliminary test. 2. A scan was taken on both power lines, Line 1 and Line 2, recording at least the six highest emissions. Emission frequency and amplitude were recorded into a computer in which correction factors were used to calculate the emission level and compare reading to the applicable limit. If EUT emission level was less –2dB to the A.V. limit in Peak mode, then the emission signal was re-checked using Q.P and Average detector. 3. The test data of the worst case condition(s) was reported on the Summary Data page. 14.5. TEST RESULT OF LINE CONDUCTED EMISSION TEST N/A Note: The EUT can not use the BT function with charging. Report No.: AGC04508191201FE03 Page 58 of 74 APPENDIX A: PHOTOGRAPHS OF TEST SETUP RADIATED EMISSION TEST SETUP BELOW 1GHZ RADIATED EMISSION TEST SETUP ABOVE 1GHZ Report No.: AGC04508191201FE03 Page 59 of 74 CONDUCTED TEST SETUP Report No.: AGC04508191201FE03 Page 60 of 74 APPENDIX B: PHOTOGRAPHS OF EUT TOTAL VIEW OF EUT Headset TOP VIEW OF EUT Report No.: AGC04508191201FE03 Page 61 of 74 BOTTOM VIEW OF EUT FRONT VIEW OF EUT Report No.: AGC04508191201FE03 Page 62 of 74 BACK VIEW OF EUT LEFT VIEW OF EUT Report No.: AGC04508191201FE03 Page 63 of 74 RIGHT VIEW OF EUT VIEW OF EUT(PORT) Report No.: AGC04508191201FE03 Page 64 of 74 Left OPEN VIEW OF EUT VIEW OF BATTERY Report No.: AGC04508191201FE03 Page 65 of 74 INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 BT Antenna Report No.: AGC04508191201FE03 Page 66 of 74 INTERNAL VIEW OF EUT-3 Right OPEN VIEW OF EUT Report No.: AGC04508191201FE03 Page 67 of 74 VIEW OF BATTERY INTERNAL VIEW OF EUT-1 Report No.: AGC04508191201FE03 Page 68 of 74 INTERNAL VIEW OF EUT-2 INTERNAL VIEW OF EUT-3 BT Antenna Report No.: AGC04508191201FE03 Page 69 of 74 Charging Dock TOP VIEW OF EUT BOTTOM VIEW OF EUT Report No.: AGC04508191201FE03 Page 70 of 74 FRONT VIEW OF EUT BACK VIEW OF EUT Report No.: AGC04508191201FE03 Page 71 of 74 LEFT VIEW OF EUT RIGHT VIEW OF EUT Report No.: AGC04508191201FE03 Page 72 of 74 VIEW OF EUT(PORT)-1 VIEW OF EUT(PORT)-2 Report No.: AGC04508191201FE03 Page 73 of 74 OPEN VIEW OF EUT VIEW OF BATTERY Report No.: AGC04508191201FE03 Page 74 of 74 INTERNAL VIEW OF EUT-1 INTERNAL VIEW OF EUT-2 ----END OF REPORT----

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