2ATOY-RT33TRUE WIRELESS EARBUDS

Difference description FCC ID: 2ATOY-RT33 Model: RT33, 6759HD-2, 6759-2, 7554, 7554CT The TRUE WIRELESS EARBUDS manufactured by Dongguan Fulun Electronics Co.,Limited needs to apply for FCC certification. The applied models are as list above. They are the same except for the model name, even the principle of the circuit, the electrical structure and all key components related to safety and electromagnetic compatibility are the same. The difference does not affect the EMC or RF for FCC related rule parts. Company: Name: Bessie Luo Company: Dongguan Fulun Electronics Co.,Limited Address: 4-8/F, Building B, Xinbosheng Industrial Park, No.5 Xinyuan S Rd,Tangxia, Dongguan.CN Phone: 86 0755-25835499 Fax: 86 0755-25835499 E-Mail: [email protected]

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date: 5/26/2020 TO WHOM IT MAY CONCERN Pursuant to Paragraphs §0.457 and 0.459 of the Commission’s Rules (47 C.F.R.) and Section §552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products: FCC ID Model name 2ATOY-RT33 RT33, 6759HD-2, 6759-2, 7554, 7554CT For the product stated above, we request that the following information be held confidential; Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos User’s Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Signature Bessie Luo Sales Manager Dongguan Fulun Electronics Co.,Limited

Dongguan Fulun Electronics Co.,Limited 4-8/F, Building B, Xinbosheng Industrial Park, No.5 Xinyuan S Rd,Tangxia, Dongguan.CN Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 5/26/2020 To whom it may concern: We, Dongguan Fulun Electronics Co.,Limited, the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: 2ATOY-RT33 including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to this application is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. Sincerely, Signature Bessie Luo Sales Manager Dongguan Fulun Electronics Co.,Limited

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 5 EXTERIOR PHOTOGRAPHS OF EUT Fig.1 Fig.2 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 2 of 5 Fig.3 Fig.4 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 3 of 5 Fig.5 Fig.6 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 4 of 5 Fig.7 Fig.8 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 5 of 5 Fig.9

Label & Label Location Size: 10mm(L)*5mm(W) FCC ID: 2ATOY-RT33

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 3 INTERIOR PHOTOGRAPHS OF EUT Fig.1 Fig.2 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 2 of 3 Fig.3 Fig.4 Bluetooth Antenna Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 3 of 3 Fig.5 Fig.6

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 2 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 1.72dBi (Max.). Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 2 of 2 Conducted Power Results Test Mode Channel Frequency (MHz) Measured Peak Output Power (dBm) GFSK 00 2402 -0.675 39 2441 -0.755 78 2480 -1.201 π/4-DQPSK 00 2402 0.222 39 2441 0.154 78 2480 -0.304 Manufacturing tolerance GFSK (Peak) Channel Channel 0 Channel 39 Channel 78 Target (dBm) -1.0 -1.0 -1.5 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 -0.5 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 0.0 1.72 1.49 10 2441 0.0 1.72 1.49 10 2480 -0.5 1.22 1.32 10 π/4-DQPSK 2402 1.0 2.72 1.87 10 2441 1.0 2.72 1.87 10 2480 0.5 2.22 1.67 10 The antenna gain of the EUT for BT is 1.72dBi (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.

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 1 of 33 Appendix A RF Test Data for BT(BDR/EDR) (Conducted Measurement) Product Name: TRUE WIRELESS EARBUDS Trade Mark: N/A Test Model: RT33 FCC ID: 2ATOY-RT33 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 Mode Channel. 20dB Bandwidth [MHz] Limit(MHz) Verdict GFSK LCH 0.799 Not Specified PASS GFSK MCH 0.846 Not Specified PASS GFSK HCH 0.797 Not Specified PASS π/4DQPSK LCH 1.197 Not Specified PASS π/4DQPSK MCH 1.194 Not Specified PASS π/4DQPSK HCH 1.193 Not Specified PASS Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 2 of 33 Test Graph Graphs GFSK/LCH GFSK/MCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 3 of 33 GFSK/HCH π/4DQPSK/LCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 4 of 33 π/4DQPSK/MCH π/4DQPSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 5 of 33 A.2 Dwell Time Mode Packet Chann el Burst Width [ms/hop/ch] Total Hops[hop*ch] Dwell Time[s] Limit [s] Verdic t GFSK DH5 LCH 2.930 106.7 0.313 0.4 PASS GFSK DH5 MCH 2.934 106.7 0.313 0.4 PASS GFSK DH5 HCH 2.934 106.7 0.313 0.4 PASS π/4DQPSK 2DH5 LCH 2.938 106.7 0.313 0.4 PASS π/4DQPSK 2DH5 MCH 2.938 106.7 0.313 0.4 PASS π/4DQPSK 2DH5 HCH 2.938 106.7 0.313 0.4 PASS Test Graph Graphs GFSK_DH5/LCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 6 of 33 GFSK_DH5/MCH GFSK_DH5/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 7 of 33 π/4DQPSK _2DH5/LCH π/4DQPSK _2DH5/MCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 8 of 33 π/4DQPSK _2DH5/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 9 of 33 A.3 Carrier Frequency Separation Mode Channel. Carrier Frequency Separation [MHz] Limit [MHz] Verdict GFSK LCH 0.997 0.795 PASS GFSK MCH 1.025 0.795 PASS GFSK HCH 1.001 0.531 PASS π/4DQPSK LCH 1.000 0.798 PASS π/4DQPSK MCH 1.000 0.796 PASS π/4DQPSK HCH 1.000 0.795 PASS Test Graph Graphs GFSK/LCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 10 of 33 GFSK/MCH GFSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 11 of 33 π/4DQPSK/LCH π/4DQPSK/MCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 12 of 33 π/4DQPSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 13 of 33 A.4 Hopping Channel Number Mode Channel. Number of Hopping Channel[N] Limit[N] Verdict GFSK Hop 79 >=15 PASS π/4DQPSK Hop 79 >=15 PASS Test Graph Graphs GFSK/Hop π/4DQPSK/Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 14 of 33 A.5 Conducted Peak Output Power Mode Channel. Maximum Peak Output Power [dBm] Limit [dBm] Verdict GFSK LCH -0.675 21 PASS GFSK MCH -0.755 21 PASS GFSK HCH -1.201 21 PASS π/4DQPSK LCH 0.222 21 PASS π/4DQPSK MCH 0.154 21 PASS π/4DQPSK HCH -0.304 21 PASS Test Graph Graphs GFSK/LCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 15 of 33 GFSK/MCH GFSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 16 of 33 π/4DQPSK/LCH π/4DQPSK/MCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 17 of 33 π/4DQPSK/HCH Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 18 of 33 A.6 Band-edge for RF Conducted Emissions Type Carrier Frequency(MHz) Frequency(MHz) Carrier Frequency Power [dBm] Bandedge Peak(dBm) Upper limit(dBm) Conclusion 1DH5 2402 2399.433 -0.867 -35.353 -20.867 Pass 1DH5 2480 2484.155 -1.707 -48.680 -21.707 Pass 2DH5 2402 2399.526 -1.764 -37.054 -21.764 Pass 2DH5 2480 2483.5 -4.624 -53.412 -24.624 Pass 1DH5-Hopping 2402 2398.47 -0.932 -41.426 -20.932 Pass 1DH5-Hopping 2480 2483.5 -1.114 -52.58 -21.114 Pass 2DH5-Hopping 2402 2399.37 -0.881 -37.687 -20.881 Pass 2DH5-Hopping 2480 2483.5 -1.088 -53.72 -21.088 Pass Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 19 of 33 Test Graph Graphs GFSK/LCH/No Hop GFSK/HCH/No Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 20 of 33 π/4DQPSK/LCH/No Hop π/4DQPSK/HCH/No Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 21 of 33 GFSK/LCH/Hop GFSK/HCH/Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 22 of 33 π/4DQPSK/LCH/Hop π/4DQPSK/HCH/Hop Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 23 of 33 A.7 RF Conducted Spurious Emissions Test Graph GFSK_LCH_Graphs Pref Puw Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 24 of 33 GFSK_MCH_Graphs Pref Puw Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 25 of 33 GFSK_HCH_Graphs Pref Puw Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 26 of 33 π/4DQPSK_LCH_Graphs Pref Puw Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 27 of 33 π/4DQPSK_MCH_Graphs Pref Puw Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 28 of 33 π/4DQPSK_HCH_Graphs Pref Puw Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 Report No.: TZ200501330-E Page 29 of 33 A.8 Restrict-band band-edge measurements Type Carrier Frequency(M Hz) Gain Ground Factor Peak Value(dBm) E Limit Conclusion Frequency [dBuV/m] [dBuV/m] (MHz) 1DH5 2402 2384.707 2.00 0.00 -39.122 58.078 74 Pass 1DH5 2480 2483.854 2.00 0.00 -28.963 68.237 74 Pass 2DH5 2402 2388.026 2.00 0.00 -39.797 57.403 74 Pass 2DH5 2480 2484.574 2.00 0.00 -33.012 64.188 74 Pass Type Carrier F…

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Report No.: TZ200501330-E Page 1 of 35 FCC TEST REPORT Test report On Behalf of Dongguan Fulun Electronics Co.,Limited For TRUE WIRELESS EARBUDS Model No: RT33, 6759HD-2, 6759-2, 7554, 7554CT FCC ID: 2ATOY-RT33 Prepared for : Dongguan Fulun Electronics Co.,Limited 4-8/F, Building B, Xinbosheng Industrial Park, No.5 Xinyuan S Rd, Tangxia, Dongguan.CN 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: 2020/5/5 - 2020/5/14 Date of Report: 2020/5/15 Report Number: TZ200501330-E 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.: TZ200501330-E Page 2 of 35 TEST RESULT CERTIFICATION Applicant’s name ................. : Dongguan Fulun Electronics Co.,Limited Address .................................. : 4-8/F, Building B, Xinbosheng Industrial Park, No.5 Xinyuan S Rd, Tangxia, Dongguan.CN Manufacture's Name ............ : Dongguan Fulun Electronics Co.,Limited Address .................................. : 4-8/F, Building B, Xinbosheng Industrial Park, No.5 Xinyuan S Rd, Tangxia, Dongguan.CN Product description Trade Mark ............................. : N/A Product name ........................... : TRUE WIRELESS EARBUDS Model No ................................ : RT33, 6759HD-2, 6759-2, 7554, 7554CT 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 ........... : 2020/5/5 - 2020/5/14 Date of Issue ......................................... : 2020/5/15 Test Result ............................................ : PASS Testing Engineer : (Nancy Li) Technical Manager : (Hugo Chen) Authorized Signatory : (Andy Zhang) Report No.: TZ200501330-E Page 3 of 35 Revision History Revision Issue Date Revisions Revised By 00 2020/5/15 Initial Issue Andy Zhang Report No.: TZ200501330-E Page 4 of 35 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 .......................................................................................................................... 5 1.6 Statement of the Measurement Uncertainty ............................................................................................. 6 1.7 Measurement Uncertainty ........................................................................................................................... 6 1.8 Description of Test Modes .......................................................................................................................... 6 2. TEST METHODOLOGY ...................................................................................................................... 7 2.1 EUT Configuration ........................................................................................................................................ 7 2.2 EUT Exercise ................................................................................................................................................ 7 2.3 General Test Procedures ............................................................................................................................ 7 2.4. Test Sample ................................................................................................................................................. 7 3. SYSTEM TEST CONFIGURATION .................................................................................................. 8 3.1 Justification .................................................................................................................................................... 8 3.2 EUT Exercise Software ............................................................................................................................... 8 3.3 Special Accessories ..................................................................................................................................... 8 3.4 Block Diagram/Schematics ......................................................................................................................... 8 3.5 Equipment Modifications ............................................................................................................................. 8 3.6 Test Setup ..................................................................................................................................................... 8 4. SUMMARY OF TEST RESULTS .........................................…

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Shenzhen Tongzhou Testing Co.,Ltd FCC ID: 2ATOY-RT33 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 1 TEST SETUP PHOTOS OF THE EUT Radiated Emission Below 1GHz Radiated Emission Above 1GHz