2AKR3-U8True wireless earbuds

Shenzhen XinZhengYu technology Co., ltd 2022-10-22 Equipment Autorisation Division Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2AKR3-U8 Product Name: true wireless earbuds Request for Confidentiality Pursuant to Sections 0.457 and 0.459 of the commissions rules, we hereby request that the following documents be held confidential: • Schematics • Block diagram • Operation description • Antenna Specification These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors <Signature> J 妞，归 Wu Name: JunHua Wu Title: General manager Company: Shenzhen XinZhengYu technology Co., ltd

Page 1 of 4 Appendix C: Photographs of EUT Product: true wireless earbuds Model: U8 External Photos Page 2 of 4 Page 3 of 4

LabelArtworkandLocation Model:U8 Label: Size:L*W=15*5mm FCCID:2AKR3-U8 Location

Page 1 of 3 Appendix C: Photographs of EUT Product: true wireless earbuds Model: U8 Internal Photos Page 2 of 3 Antenna Page 3 of 3 Page 4 of 4

Acc Ant MAX ERP WOR 10^ The ording to t gain = Xoutputp P=-2.11+ RSE CASE ^-0.018= en SAR e o 447498 D =4.08dBi power：-2 4.08-2.1 : =0.9594mW valuatio RF Expo D04 Interi 2.11dBm@2 15= -0.1 W<2.715m on is no osure eval im General 2480MHz 8dBm mW ot requir luation l RF Expos red sure Guidaance v01

Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com TEST REPORT FCC ID. ............................ : 2AKR3-U8 Test Report No. ............... : TCT221012E011 Date of issue ................... : Oct. 20, 2022 Testing laboratory .......... : SHENZHEN TONGCE TESTING LAB Testing location/ address: 2101 & 2201, Zhenchang Factory Renshan Industrial Zone, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, 518103, People's Republic of China Applicant's name ............ : Shenzhen XinZhengYu technology Co., ltd Address ........................... : 5th floor, Building 4, HaiTianLanYu Industrial, Park, ShiLong Community, ShiYan Town, Bao'an District, Shenzhen, China Manufacturer's name ... : Shenzhen XinZhengYu technology Co., ltd Address ........................... : 5th floor, Building 4, HaiTianLanYu Industrial, Park, ShiLong Community, ShiYan Town, Bao'an District, Shenzhen, China Standard(s) ..................... : FCC CFR Title 47 Part 15 Subpart C Section 15.247 FCC KDB 558074 D01 15.247 Meas Guidance v05r02 ANSI C63.10:2013 Product Name ................. : true wireless earbuds Trade Mark ...................... : N/A Model/Type reference..... : U8, U7, U9, U10, CT11, U-TS, CT22, U99 Rating(s).......................... : Rechargeable Li-ion Battery DC 3.7V Date of receipt of test item ......................................... : Oct. 12, 2022 Date (s) of performance of test ................................... : Oct. 12, 2022 - Oct. 20, 2022 Tested by (+signature) ... : Onnado YE Check by (+signature) .... : Beryl ZHAO Approved by (+signature): Tomsin General disclaimer: This report shall not be reproduced except in full, without the written approval of SHENZHEN TONGCE TESTING LAB. This document may be altered or revised by SHENZHEN TONGCE TESTING LAB personnel only, and shall be noted in the revision section of the document. The test results in the report only apply to the tested sample. Report No.: TCT221012E011 Page 2 of 52 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Table of Contents 1. General Product Information .................................................................. 3 1.1. EUT description ..................................................................................................... 3 1.2. Model(s) list ............................................................................................................ 3 1.3. Operation Frequency ............................................................................................ 3 2. Test Result Summary .............................................................................. 4 3. General Information ................................................................................. 5 3.1. Test environment and mode ................................................................................. 5 3.2. Description of Support Units ................................................................................ 5 4. Facilities and Accreditations .................................................................. 6 4.1. Facilities ................................................................................................................. 6 4.2. Location ................................................................................................................. 6 4.3. Measurement Uncertainty ..................................................................................... 6 5. Test Results and Measurement Data ..................................................... 7 5.1. Antenna requirement ............................................................................................ 7 5.2. Conducted Emission ............................................................................................. 8 5.3. Conducted Output Power ................................................................................... 12 5.4. Emission Bandwidth ........................................................................................... 13 5.5. Power Spectral Density ....................................................................................... 14 5.6. Conducted Band Edge and Spurious Emission Measurement ....................... 15 5.7. Radiated Spurious Emission Measurement ...................................................... 17 Appendix A: Test Result of Conducted Test Appendix B: Photographs of Test Setup Appendix C: Photographs of EUT Report No.: TCT221012E011 Page 3 of 52 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 1. General Product Information 1.1. EUT description Product Name ....................... : true wireless earbuds Model/Type reference........... : U8 Sample Number....................: TCT221012E011-0101 Bluetooth Version ................ : V5.0 Operation Frequency ........... : 2402MHz~2480MHz Channel Separation .............. : 2MHz Number of Channel .............. : 40 Modulation Type ................... : GFSK Antenna Type ........................ : Chip Antenna Antenna Gain ........................ : 4.08dBi Rating(s)................................ : Rechargeable Li-ion Battery DC 3.7V Note: The antenna gain listed in this report is provided by applicant, and the test laboratory is not responsible for this parameter. 1.2. Model(s) list No. Model No. Tested with 1 U8 Other models U7, U9, U10, CT11, U-TS, CT22, U99 Note: U8 is tested model, other models are derivative models. The models are identical in circuit and PCB layout, only different on the model names. So the test data of U8 can represent the remaining models. 1.3. Operation Frequency Channel Frequency Channel Frequency Channel Frequency Channel Frequency 0 2402MHz 10 2422MHz 20 2442MHz 30 2462MHz 1 2404MHz 11 2424MHz 21 2444MHz 31 2464MHz ... ... ... ... ... ... ... ... 8 2418MHz 18 2438MHz 28 2458MHz 38 2478MHz 9 2420MHz 19 2440MHz 29 2460MHz 39 2480MHz Remark: Channel 0, 19 & 39 have been tested. …

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Page 1 of 2 Appendix B: Photographs of Test Setup Product: true wireless earbuds Model: U8 Radiated Emission Page 2 of 2 Conducted Emission