2ALNA-BTH21Wireless Headphones

* the ap en 9/7/ TO: AT T FCC FRN Per Ltd. to t h Co m FCC Phy Con Age Th e Th e term proc Ap p Sign Prin Titl e Com Tech Date Age applicant m pplicant’s age ntity. An appl /2023 Federa 7435 O Columb TN.: Revie C ID: 2ALNA N of applica section 2.9 ](“the applic he followin mpany Nam C Registrati ysical U.S. C ntact Person ent Email Ad e above con e applicant a minated all m ceeding inv plicant Sign ned: ted name: C e: Test engin mpany Nam hnology Co., e: 9/7/2023 ent Signed Shenzhe ust designat ent for servic licant located U.S. A l Communic Oakland Mills bia, MD 210 ewing Engin A-BTH21 ant: 002638 911(d)(7) of cant”) certif ng U.S. age me: Thousan ion Number Company A n: Jack Yu ddress: serv ntact person accepts to m marketing a volving the e ned: Catherine Lu ee r me: Shenzhe , Ltd. (if differen en Thous te a contact l ce of process d in the Unite Agent Des Certifi cations Com s Road 046 neer 8363 fthe FCC ru fies that the nt* for ser v ndshores In r (FRN): 003 Address: 377 vice@tribita n accepts th maintain an and importat equipment. en Thousan nt from App sandsho located in the s, regardless ed States ma signation cation At mmission ules,[ Shenz equipment vice of pro nc 33423062 707 Cherry audio.com he obligation agent for n tion or the c ndshores plicant): ores Tech e United Sta s of whether ay designate for Servi ttestation zhen Thous t for which a cess: St, Newar k n for service no less than conclusion o Signed: Printed Title: T e Compan Date: 9 / hnology tes for purpo the applican e itself as the ice of Pro Letter sandshores authorizatio k, CA 94560 e of process n one year a of any Com name: Jack est Engineer ny Name: Th /7/2023 Co., Ltd. oses of acting t is a domes e agent for se ocess - Technolog on is sought 0, United St s. after the gra mmission-rel Yu housandshor . g as the tic or foreig n ervice of pro y Co., is designa t tates antee has lated res Inc n cess. ted

ShenzhenThousandshoresTechnologyCo.,Ltd. CoveredEquipmentCertificationAttestationLetter 9/7/2023 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA ATTN.:ReviewingEngineer FCCID:2ALNA-BTH21 ShenzhenThousandshoresTechnologyCo.,Ltd.(“theapplicant”)certifiesthatthe equipmentforwhichauthorizationissoughtisnot“covered”equipmentprohibitedfrom receivinganequipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedbyanyof theentitiesidentifiedonthecurrentCoveredList,theapplicantshouldincludean explanationonwhytheequipmentisnot“covered”equipment. ShenzhenThousandshoresTechnologyCo.,Ltd.(“theapplicant”)certifiesthat,asofthe dateofthefilingoftheapplication,theapplicantisnotidentifiedontheCoveredListas anentityproducing“covered”equipment. Signed: Printedname:CatherineLu Title:Testengineer CompanyName:ShenzhenThousandshoresTechnologyCo.,Ltd. Date:9/7/2023

ShenzhenThousandshoresTechnologyCo.,Ltd. 2023-09-07 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 AuthoritytoActasAgent Onourbehalf,IappointSHENZHENTONGCETESTINGLAB/2101&2201,Zhenchang FactoryRenshanIndustrialZone,FuhaiSubdistrict,Bao'anDistrict,Shenzhen,Guangdong, 518103,People'sRepublicofChina(NameofAgentcompanynameandaddress)toactas ouragentinthepreparationofthisapplicationforequipmentcertification.Icertifythat submitteddocumentsproperlydescribethedeviceorsystemforwhichequipment certificationissought.Ialsocertifythateachunitmanufactured,importedormarketed,as definedintheFederalCommunicationsCommission’sregulationswillhaveaffixedtoita labelidenticaltothatsubmittedforapprovalwiththisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonourbehalf,Iack nowledgethatallresponsibilityforcomplyingwiththetermsandconditionsforcertification,stillres ideswithShenzhenThousandshoresTechnologyCo.,Ltd./Room1101,BuildingB,Lotus Plaza,No.3186,NanshanAvenue,MajialongCommunity,NantouStreet,Nanshan District,Shenzhen,China(ApplicantNameandaddress) <Signature> Name:CatherineLu Title:Testengineer ApplicantCompany:ShenzhenThousandshoresTechnologyCo.,Ltd.

ShenzhenThousandshoresTechnologyCo.,Ltd. 2023-09-07 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:2ALNA-BTH21 ProductName:WirelessHeadphones RequestforConfidentiality PursuanttoSections0.457and0.459ofthecommissionsrules,weherebyrequestthat thefollowingdocumentsbeheldconfidential: Schematics  Blockdiagram Operationdescription Thesematerialscontaintradesecretsandproprietaryinformationandarenot customarilyreleasedtothepublic.Thepublicdisclosureofthisinformationmightbe harmfultothecompanyandprovideunjustifiedbenefitstoourcompetitors. <Signature> Name:CatherineLu Title:Testengineer Company:ShenzhenThousandshoresTechnologyCo.,Ltd.

Page 1 of 4 Appendix C: Photographs of EUT Product: Wireless Headphones Model: BTH21 External Photos Page 2 of 4 Page 3 of 4 Page 4 of 4

Label Artwork and Location Model: BTH21 Location Label:

Page 1 of 3 Appendix C: Photographs of EUT Product: Wireless Headphones Model: BTH21 Internal Photos Page 2 of 3 Antenna Page 3 of 3

Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com TEST REPORT FCC ID. ............................ : 2ALNA-BTH21 Test Report No. ............... : TCT230828E044 Date of issue ................... : Sep. 04, 2023 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 Thousandshores Technology Co., Ltd. Address ........................... : Room 1101, Building B, Lotus Plaza, No. 3186, Nanshan Avenue, Majialong Community, Nantou Street, Nanshan District, Shenzhen, China Manufacturer's name ... : Shenzhen Thousandshores Technology Co., Ltd. Address ........................... : Room 1101, Building B, Lotus Plaza, No. 3186, Nanshan Avenue, Majialong Community, Nantou Street, Nanshan District, Shenzhen, China Standard(s) ..................... : FCC CFR Title 47 Part 1.1307 Product Name ................. : Wireless Headphones Trade Mark ...................... : iClever Model/Type reference..... : BTH21 Rating(s).......................... : Input: DC 5V, 1A Rechargeable Li-ion Battery DC 3.7V Date of receipt of test item ......................................... : Aug. 28, 2023 Date (s) of performance of test ................................... : Aug. 16, 2023 - Sep. 04, 2023 Tested by (+signature) ... : Ronaldo LUO 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.: TCT230828E044 Page 2 of 6 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 2. General Information ................................................................................. 4 2.1. Test environment and mode ................................................................................. 4 2.2. Description of Support Units ................................................................................ 4 3. Facilities and Accreditations .................................................................. 5 3.1. Facilities ................................................................................................................. 5 3.2. Location ................................................................................................................. 5 4. Test Results and Measurement Data ..................................................... 6 Report No.: TCT230828E044 Page 3 of 6 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 ....................... : Wireless Headphones Model/Type reference........... : BTH21 Sample Number....................: TCT230828E015-0101 Operation Frequency ........... : 2402MHz~2480MHz Modulation Type ................... : For BT: GFSK, π/4-DQPSK, 8DPSK For BLE: GFSK Antenna Type ........................ : PCB Antenna Antenna Gain ........................ : 0dBi Rating(s)................................ : Input: DC 5V, 1A 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 None. Report No.: TCT230828E044 Page 4 of 6 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 2. General Information 2.1. Test environment and mode Item Normal condition Temperature +25ºC Voltage DC 3.7V Humidity 56% Atmospheric Pressure: 1008 mbar Test Mode: Transmitting mode: Keep the EUT in continuous transmitting by select channel 2.2. Description of Support Units The EUT has been tested as an independent unit together with other necessary accessories or support units. The following support units or accessories were used to form a representative test configuration during the tests. Equipment Model No. Serial No. FCC ID Trade Name / / / / / Note: 1. All the equipment/cables were placed in the worst-case configuration to maximize the emission during the test. 2. Grounding was established in accordance with the manufacturer’s requirements and conditions for the intended use. 3. For conducted measurements (Output Power, 20dB Occupied Bandwidth, Carrier Frequencies Separation, Hopping Channel Number, Dwell Time, Spurious Emissions), the antenna of EUT is connected to the test equipment via temporary antenna connector, the antenna connector is soldered on the antenna port of EUT, and the temporary antenna connector is listed in the Test Instruments. Report No.: TCT230828E044 Page 5 of 6 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com 3. Facilities and Accreditations 3.1. Facilities The test facility is recognized, certified, or accredited by the following organizations: ● FCC - Registration No.: 645098 SHENZHEN TONGCE TESTING LAB Designation Number: CN1205 The testing lab has been registered and fully described in a report with the (FCC) Federal Communications Commission. The acceptance letter from the FCC is maintained in our files. ● IC - Registration No.: 10668A-1 SHENZHEN TONGCE TESTING LAB CAB identifier: CN0031 The testing lab has been registered by Certification and Engineering B…

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Pr Antenna Layout & module on the system board oduct specification Quick Reference Date Antenna module on the system board Frequenc Range 2400 ~ 2500MHz Ant. Port Input Pwr. (dBm) 0 (Typ. BT class 2 output power) Tot. Rad. Pwr. (dBm) -1.2 (Input pwr – loss pwr) Peak EIRP(dBm) 1.2 Directivity (dBi) 1 (all direction antenna) Efficiency (dB) 6 0.2 % Gain (dBi) 0 (Avg Gain XY-plane) Maximum Power (dBm) 1.7 (XY-plane) Minimum Power (dBm) -4(XY-plane) Avg. Power (dBm) -0.5(XY-plane) Input Impendence(ohm) 50 Polarization Type V ertical & Horizontal V . S .W . R < 1.4 All the technical data and information contained herein are subject to change without prior notice 2400 Total And Polar: Antenna Gain: 2425 Total And Polar: 2450 Total And Polar: 2475 Total And Polar: 2500 Total And Polar:

Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com TEST REPORT FCC ID. ............................ : 2ALNA-BTH21 Test Report No. ............... : TCT230828E015 Date of issue ................... : Sep. 04, 2023 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 Thousandshores Technology Co., Ltd. Address ........................... : Room 1101, Building B, Lotus Plaza, No. 3186, Nanshan Avenue, Majialong Community, Nantou Street, Nanshan District, Shenzhen, China Manufacturer's name ... : Shenzhen Thousandshores Technology Co., Ltd. Address ........................... : Room 1101, Building B, Lotus Plaza, No. 3186, Nanshan Avenue, Majialong Community, Nantou Street, Nanshan 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 ................. : Wireless Headphones Trade Mark ...................... : iClever Model/Type reference..... : BTH21 Rating(s).......................... : Input: DC 5V, 1A Rechargeable Li-ion Battery DC 3.7V Date of receipt of test item ......................................... : Aug. 28, 2023 Date (s) of performance of test ................................... : Aug. 16, 2023 - Sep. 04, 2023 Tested by (+signature) ... : Ronaldo LUO 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.: TCT230828E015 Page 2 of 95 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 ............................................................................................ 4 2. Test Result Summary .............................................................................. 5 3. General Information ................................................................................. 6 3.1. Test environment and mode ................................................................................. 6 3.2. Description of Support Units ................................................................................ 6 4. Facilities and Accreditations .................................................................. 7 4.1. Facilities ................................................................................................................. 7 4.2. Location ................................................................................................................. 7 4.3. Measurement Uncertainty ..................................................................................... 7 5. Test Results and Measurement Data ..................................................... 8 5.1. Antenna requirement ............................................................................................ 8 5.2. Conducted Emission ............................................................................................. 9 5.3. Conducted Output Power ................................................................................... 13 5.4. 20dB Occupy Bandwidth .................................................................................... 14 5.5. Carrier Frequencies Separation ......................................................................... 15 5.6. Hopping Channel Number .................................................................................. 16 5.7. Dwell Time ............................................................................................................ 17 5.8. Pseudorandom Frequency Hopping Sequence ................................................ 18 5.9. Conducted Band Edge Measurement ................................................................ 19 5.10.Conducted Spurious Emission Measurement .................................................. 20 5.11.Radiated Spurious Emission Measurement ..................................................... 21 Appendix A: Test Result of Conducted Test Appendix B: Photographs of Test Setup Appendix C: Photographs of EUT Report No.: TCT230828E015 Page 3 of 95 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 ....................... : Wireless Headphones Model/Type reference........... : BTH21 Sample Number....................: TCT230828E015-0101 Bluetooth Version ................ : V5.3 (This report is for BDR+EDR) Operation Frequency ........... : 2402MHz~2480MHz Transfer Rate ........................ : 1/2/3 Mbits/s Number of Channel .............. : 79 Modulation Type ................... : GFSK, π/4-DQPSK, 8DPSK Modulation Technology ....... : FHSS Antenna Type ........................ : PCB Antenna Antenna Gain ........................ : 0dBi Rating(s)................................ : Input: DC 5V, 1A 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 None. Report No.: TCT230828E015 Page 4 of 95 Hot…

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Report No.: TCT230828E015 Page 34 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Power NVNT 1-DH1 2480MHz Power NVNT 2-DH1 2402MHz Report No.: TCT230828E015 Page 35 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Power NVNT 2-DH1 2441MHz Power NVNT 2-DH1 2480MHz Report No.: TCT230828E015 Page 36 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Power NVNT 3-DH1 2402MHz Power NVNT 3-DH1 2441MHz Report No.: TCT230828E015 Page 37 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Power NVNT 3-DH1 2480MHz Report No.: TCT230828E015 Page 38 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com -20dB Bandwidth Condition Mode Frequency (MHz) -20 dB Bandwidth (MHz) Verdict NVNT 1-DH1 2402 0.882 Pass NVNT 1-DH1 2441 0.924 Pass NVNT 1-DH1 2480 0.920 Pass NVNT 2-DH1 2402 1.273 Pass NVNT 2-DH1 2441 1.258 Pass NVNT 2-DH1 2480 1.264 Pass NVNT 3-DH1 2402 1.224 Pass NVNT 3-DH1 2441 1.251 Pass NVNT 3-DH1 2480 1.257 Pass Report No.: TCT230828E015 Page 39 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Test Graphs -20dB Bandwidth NVNT 1-DH1 2402MHz -20dB Bandwidth NVNT 1-DH1 2441MHz Report No.: TCT230828E015 Page 40 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com -20dB Bandwidth NVNT 1-DH1 2480MHz -20dB Bandwidth NVNT 2-DH1 2402MHz Report No.: TCT230828E015 Page 41 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com -20dB Bandwidth NVNT 2-DH1 2441MHz -20dB Bandwidth NVNT 2-DH1 2480MHz Report No.: TCT230828E015 Page 42 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com -20dB Bandwidth NVNT 3-DH1 2402MHz -20dB Bandwidth NVNT 3-DH1 2441MHz Report No.: TCT230828E015 Page 43 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com -20dB Bandwidth NVNT 3-DH1 2480MHz Report No.: TCT230828E015 Page 44 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Carrier Frequencies Separation Condition Mode Hopping Freq1 (MHz) Hopping Freq2 (MHz) HFS (MHz) Limit (MHz) Verdict NVNT 1-DH1 2401.888 2402.890 1.002 0.924 Pass NVNT 1-DH1 2440.892 2441.888 0.996 0.924 Pass NVNT 1-DH1 2478.892 2479.890 0.998 0.924 Pass NVNT 2-DH1 2401.890 2402.890 1.000 0.849 Pass NVNT 2-DH1 2440.894 2441.894 1.000 0.849 Pass NVNT 2-DH1 2478.894 2479.890 0.996 0.849 Pass NVNT 3-DH1 2401.892 2402.888 0.996 0.838 Pass NVNT 3-DH1 2440.890 2441.888 0.998 0.838 Pass NVNT 3-DH1 2478.890 2479.892 1.002 0.838 Pass Report No.: TCT230828E015 Page 45 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Test Graphs CFS NVNT 1-DH1 2402MHz CFS NVNT 1-DH1 2441MHz Report No.: TCT230828E015 Page 46 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com CFS NVNT 1-DH1 2480MHz CFS NVNT 2-DH1 2402MHz Report No.: TCT230828E015 Page 47 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com CFS NVNT 2-DH1 2441MHz CFS NVNT 2-DH1 2480MHz Report No.: TCT230828E015 Page 48 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com CFS NVNT 3-DH1 2402MHz CFS NVNT 3-DH1 2441MHz Report No.: TCT230828E015 Page 49 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com CFS NVNT 3-DH1 2480MHz Report No.: TCT230828E015 Page 50 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Band Edge Condition Mode Frequency (MHz) Hopping Mode Max Value (dBc) Limit (dBc) Verdict NVNT 1-DH1 2402 No-Hopping -54.37 -20 Pass NVNT 1-DH1 2480 No-Hopping -56.55 -20 Pass NVNT 2-DH1 2402 No-Hopping -55.04 -20 Pass NVNT 2-DH1 2480 No-Hopping -56.77 -20 Pass NVNT 3-DH1 2402 No-Hopping -55.74 -20 Pass NVNT 3-DH1 2480 No-Hopping -56.50 -20 Pass Report No.: TCT230828E015 Page 51 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Test Graphs Band Edge NVNT 1-DH1 2402MHz No-Hopping Ref Band Edge NVNT 1-DH1 2402MHz No-Hopping Emission Report No.: TCT230828E015 Page 52 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Band Edge NVNT 1-DH1 2480MHz No-Hopping Ref Band Edge NVNT 1-DH1 2480MHz No-Hopping Emission Report No.: TCT230828E015 Page 53 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Band Edge NVNT 2-DH1 2402MHz No-Hopping Ref Band Edge NVNT 2-DH1 2402MHz No-Hopping Emission Report No.: TCT230828E015 Page 54 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Band Edge NVNT 2-DH1 2480MHz No-Hopping Ref Band Edge NVNT 2-DH1 2480MHz No-Hopping Emission Report No.: TCT230828E015 Page 55 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Band Edge NVNT 3-DH1 2402MHz No-Hopping Ref Band Edge NVNT 3-DH1 2402MHz No-Hopping Emission Report No.: TCT230828E015 Page 56 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Band Edge NVNT 3-DH1 2480MHz No-Hopping Ref Band Edge NVNT 3-DH1 2480MHz No-Hopping Emission Report No.: TCT230828E015 Page 57 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Band Edge(Hopping) Condition Mode Frequency (MHz) Hopping Mode Max Value (dBc) Limit (dBc) Verdict NVNT 1-DH1 2402 Hopping -55.09 -20 Pass NVNT 1-DH1 2480 Hopping -53.51 -20 Pass NVNT 2-DH1 2402 Hopping -55.57 -20 Pass NVNT 2-DH1 2480 Hopping -53.84 -20 Pass NVNT 3-DH1 2402 Hopping -55.78 -20 Pass NVNT 3-DH1 2480 Hopping -54.60 -20 Pass Report No.: TCT230828E015 Page 58 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.…

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Report No.: TCT230828E015 Page 67 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Tx. Spurious NVNT 1-DH1 2480MHz Ref Tx. Spurious NVNT 1-DH1 2480MHz Emission Report No.: TCT230828E015 Page 68 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Tx. Spurious NVNT 2-DH1 2402MHz Ref Tx. Spurious NVNT 2-DH1 2402MHz Emission Report No.: TCT230828E015 Page 69 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Tx. Spurious NVNT 2-DH1 2441MHz Ref Tx. Spurious NVNT 2-DH1 2441MHz Emission Report No.: TCT230828E015 Page 70 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Tx. Spurious NVNT 2-DH1 2480MHz Ref Tx. Spurious NVNT 2-DH1 2480MHz Emission Report No.: TCT230828E015 Page 71 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Tx. Spurious NVNT 3-DH1 2402MHz Ref Tx. Spurious NVNT 3-DH1 2402MHz Emission Report No.: TCT230828E015 Page 72 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Tx. Spurious NVNT 3-DH1 2441MHz Ref Tx. Spurious NVNT 3-DH1 2441MHz Emission Report No.: TCT230828E015 Page 73 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Tx. Spurious NVNT 3-DH1 2480MHz Ref Tx. Spurious NVNT 3-DH1 2480MHz Emission Report No.: TCT230828E015 Page 74 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Number of Hopping Channel Condition Mode Hopping Number Limit Verdict NVNT 1-DH1 79 15 Pass NVNT 2-DH1 79 15 Pass NVNT 3-DH1 79 15 Pass Report No.: TCT230828E015 Page 75 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Test Graphs Hopping No. NVNT 1-DH1 2441MHz Hopping No. NVNT 2-DH1 2441MHz Report No.: TCT230828E015 Page 76 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Hopping No. NVNT 3-DH1 2441MHz Report No.: TCT230828E015 Page 77 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Dwell Time Condition Mode Frequency (MHz) Pulse Time (ms) Total Dwell Time (ms) Burst Count Period Time (ms) Limit (ms) Verdict NVNT 1-DH1 2441 0.38 121.22 319 31600 400 Pass NVNT 1-DH3 2441 1.64 267.32 163 31600 400 Pass NVNT 1-DH5 2441 2.89 335.24 116 31600 400 Pass NVNT 2-DH1 2441 0.39 124.02 318 31600 400 Pass NVNT 2-DH3 2441 1.64 265.68 162 31600 400 Pass NVNT 2-DH5 2441 2.89 315.01 109 31600 400 Pass NVNT 3-DH1 2441 0.39 124.80 320 31600 400 Pass NVNT 3-DH3 2441 1.64 250.92 153 31600 400 Pass NVNT 3-DH5 2441 2.89 306.34 106 31600 400 Pass Report No.: TCT230828E015 Page 78 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Test Graphs Dwell NVNT 1-DH1 2441MHz One Burst Dwell NVNT 1-DH1 2441MHz Accumulated Report No.: TCT230828E015 Page 79 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Dwell NVNT 1-DH3 2441MHz One Burst Dwell NVNT 1-DH3 2441MHz Accumulated Report No.: TCT230828E015 Page 80 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Dwell NVNT 1-DH5 2441MHz One Burst Dwell NVNT 1-DH5 2441MHz Accumulated Report No.: TCT230828E015 Page 81 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Dwell NVNT 2-DH1 2441MHz One Burst Dwell NVNT 2-DH1 2441MHz Accumulated Report No.: TCT230828E015 Page 82 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Dwell NVNT 2-DH3 2441MHz One Burst Dwell NVNT 2-DH3 2441MHz Accumulated Report No.: TCT230828E015 Page 83 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Dwell NVNT 2-DH5 2441MHz One Burst Dwell NVNT 2-DH5 2441MHz Accumulated Report No.: TCT230828E015 Page 84 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Dwell NVNT 3-DH1 2441MHz One Burst Dwell NVNT 3-DH1 2441MHz Accumulated Report No.: TCT230828E015 Page 85 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Dwell NVNT 3-DH3 2441MHz One Burst Dwell NVNT 3-DH3 2441MHz Accumulated Report No.: TCT230828E015 Page 86 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Dwell NVNT 3-DH5 2441MHz One Burst Dwell NVNT 3-DH5 2441MHz Accumulated Report No.: TCT230828E015 Page 87 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Appendix B: Photographs of Test Setup Product: Wireless Headphones Model: BTH21 Radiated Emission Report No.: TCT230828E015 Page 88 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Conducted Emission Report No.: TCT230828E015 Page 89 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Appendix C: Photographs of EUT Product: Wireless Headphones Model: BTH21 External Photos Report No.: TCT230828E015 Page 90 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT230828E015 Page 91 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT230828E015 Page 92 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT230828E015 Page 93 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Product: Wireless Headphones Model: BTH21 Internal Photos Report No.: TCT230828E015 Page 94 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com Report No.: TCT230828E015 Page 95 of 95 Hotline: 400-6611-140 Tel: 86-755-27673339 Fax: 86-755-27673332 http://www.tct-lab.com *****END OF REPORT*****

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