2A6SW-NT35ATrue Wireless Earbuds

Dec.13,2022 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:2A6SW-NT35A ProductName:TrueWirelessEarbuds RequestforConfidentiality PursuanttoSections0.457and0.459ofthecommissionsrules,weherebyrequestthat thefollowingdocumentsbeheldconfidential: (Listherethedocumentsforwhichyouareseekingconfidentiality–forexample...)  Schematics Blockdiagram Operationdescription Thesematerialscontaintradesecretsandproprietaryinformationandarenot customarilyreleasedtothepublic.Thepublicdisclosureofthisinformationmightbe harmfultothecompanyandprovideunjustifiedbenefitstoourcompetitors. <Signature> Name：Yulanwen Title：N/A Company：SMARTSOUNDTECHNOLOGYCO.,LTD

Dec.13,2022 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 AuthoritytoActasAgent Onourbehalf,IappointBlueAsiaofTechnicalServices(Shenzhen)Co.,Ltd. BuildingC,No.107,ShihuanRoad,ShiyanSub-District,BaoanDistrict,Shenzhen,Guangdong Province,China (NameofAgentcompanynameandaddress)toactasouragentinthe preparationofthisapplicationforequipmentcertification.Icertifythatsubmitteddocuments properlydescribethedeviceorsystemforwhichequipmentcertificationissought.Ialso certifythateachunitmanufactured,importedormarketed,asdefinedintheFederal CommunicationsCommission’sregulationswillhaveaffixedtoitalabelidenticaltothat submittedforapprovalwiththisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonourbehalf,I acknowledgethatallresponsibilityforcomplyingwiththetermsandconditionsforcertification, stillresideswithSMARTSOUNDTECHNOLOGYCO.,LTD，Room701,28XinhongRoad,Lincun,Tangxia Town，DongguanCity,Guangdong(ApplicantNameandaddress) <Signature> Name：Yulanwen Title：N/A Company：SMARTSOUNDTECHNOLOGYCO.,LTD

Modeldifferenceletter ProductName:TrueWirelessEarbuds ModeNo.: N35，NT35A,NT35S FCCID:2A6SW-NT35A Wedeclarethatallmodelsareelectricallyidentical,onlymodelno.and colorisdifferent. Theproducthaveleftandrightearbuds,leftandrightearbudsareelect ricallyidentical. <Signature> Name ：Yulanwen Title：N/A Company ：SMARTSOUNDTECHNOLOGYCO.,LTD

ProductName: TrueWirelessEarbuds

ProductName: TrueWirelessEarbuds

RF Exposure evaluation Product Name : True Wireless Earbuds FCC ID : 2A6SW-NT35A Test Standard : KDB447498D04 General RF Exposure Guidance v01 According to 447498 D04 Interim General RF Exposure Guidance v01 Ant gain = 1.24 dBi MAX output power ：1.918dBm@2441MHz ERP=1.918+1.24-2.15=1.008dBm WORSE CASE: 10^0.1918=1.555mW < 2.715 mW Comply with RF exposure exemption limit.

Page 1 of98 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Add: Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com TEST REPORT Product Name : True Wireless Earbuds Brand Mark : N/A Model No. : N35 Extension model : NT35A, NT35S FCC ID : 2A6SW-NT35A Report Number : BLA-EMC-202211-A5902 Date of Sample Receipt : 2022/11/21 Date of Test : 2022/11/21 to 2022/11/29 Date of Issue : 2022/11/29 Test Standard : 47 CFR Part 15, Subpart C 15.247 Test Result : Pass Prepared for: SMARTSOUND TECHNOLOGY CO.,LTD Room 701, 28 Xinhong Road, Lincun, Tangxia Town, Dongguan City, Guangdong, China Prepared by: BlueAsia of Technical Services(Shenzhen) Co.,Ltd. Building C, No. 107, Shihuan Road, Shiyan Sub-District, Baoan District, Shenzhen, Guangdong Province, China TEL: +86-755-23059481 Compiled by: Review by: Approved by: 2022/11/2Date: 9 Report No.: BLA-EMC-202211-A5902 Page 2 of 98 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com REPORT REVISE RECORD Version No. Date Description 00 2022/11/29 Original Report No.: BLA-EMC-202211-A5902 Page 3 of 98 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: [email protected] www.cblueasia.com TABLE OF CONTENTS 1 TEST SUMMARY ........................................................................................................................................5 2 GENERAL INFORMATION .........................................................................................................................6 3 GENERAL DESCRIPTION OF E.U.T. .........................................................................................................6 4 TEST ENVIRONMENT ................................................................................................................................7 5 TEST MODE ................................................................................................................................................7 6 MEASUREMENT UNCERTAINTY ..............................................................................................................7 7 DESCRIPTION OF SUPPORT UNIT...........................................................................................................8 8 LABORATORY LOCATION .........................................................................................................................8 9 TEST INSTRUMENTS LIST ........................................................................................................................9 10 ANTENNA REQUIREMENT ...................................................................................................................... 11 10.1 CONCLUSION ....................................................................................................................................................... 11 11 CONDUCTED SPURIOUS EMISSIONS .................................................................................................. 12 11.1 LIMITS .............................................................................................................................................................. 12 11.2 BLOCK DIAGRAM OF TEST SETUP ..................................................................................................................... 12 11.3 TEST DATA .......................................................................................................................................................... 13 12 20DB BANDWIDTH .................................................................................................................................. 14 12.1 BLOCK DIAGRAM OF TEST SETUP ..................................................................................................................... 14 12.2 TEST DATA .......................................................................................................................................................... 14 13 CONDUCTED PEAK OUTPUT POWER ................................................................................................. 15 13.1 LIMITS .............................................................................................................................................................. 15 13.2 BLOCK DIAGRAM OF TEST SETUP ..................................................................................................................... 15 13.3 TEST DATA .......................................................................................................................................................... 16 14 CONDUCTED EMISSIONS AT AC POWER LINE (150KHZ-30MHZ)..................................................... 17 14.1 LIMITS .............................................................................................................................................................. 17 14.2 BLOCK DIAGRAM OF TEST SETUP ..................................................................................................................... 17 14.3 PROCEDURE ..................................................................................................................................................... 17 14.4 TEST DATA .......................................................................................................................................................... 19 15 RADIATED SPURIOUS EMISSIONS ....................................................................................................... 21 15.1 LIMITS .............................................................................................................................................................. 21 Report No.: BLA-EMC-202211-A5902 Page 4 of 98 BlueAsia of Technical Services(Shenzhen) Co., Ltd. Tel: +86-755-23059481 Email: marketing@cblueasia.…

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Tolerances (Unless otherwise specified) SHEN ZHEN YINGFENG ANTENNA TECHNOLOGYCO.,LTD X : ± 1 X.X : ± 0.1 X.XX : ± 0.01 Angle : ± Hole Dia. : ± Scale : Unit：mm THIS SPECIFICATION IS THE PROPERTY OF UNICTRON TECHNOLOGIES CORPORATION AND SHALL NOT BE REPRODUCED OR USED IN ALL CIRCUMSTANCES WITHOUT WRITTEN PERMISSION Drawn By : Shelley Checked By : Simon Designed By :Simon Approved By :Frank TITLE：BT FPC Antenna( NT35A-L/R) PART S2B4BB1F1B19000 REV. NO. A PAGE 1 OF 6 7 0 7 0 1 1 (5) )4( ) 3( ) 2( )1( 4 B 7 0 9 B F B B 1 2 S BT FPC Antenna (NT35A-L/R) 1. Explanation of Product Number Product Description: (1) Product Categories: B:BT Antenna (2) Dimensions: B1:25.17*12.8*0.12 (mm) (3) Material: F: FPC (4) Working Frequencies: 1B: 2.4G-2.5G (5) Antenna Series: 01: Serial number Tolerances (Unless otherwise specified) SHEN ZHEN YINGFENG ANTENNA TECHNOLOG YCO.,LTD X : ± 1 X.X : ± 0.1 X.XX : ± 0.01 Angle : ± Hole Dia. : ± Scale : Unit：mm THIS SPECIFICATION IS THE PROPERTY OF UNICTRON TECHNOLOGIES CORPORATION AND SHALL NOT BE REPRODUCED OR USED IN ALL CIRCUMSTANCES WITHOUT WRITTEN PERMISSION Drawn By : Shelley Checked By : Simon Designed By :Simon Approved By :Frank TITLE：BT FPC Antenna( NT35A-L/R) PART S2B4BB1F1B19000 REV. NO. A PAGE 2 OF 6 2.Features *Stable and reliable in performances *RoHS compliance *Low cost 3.Applications *BT 4． Description *YINGFENMG FPC antenna series are specially designed for 2.4G-2.5G band application. Based on YINGFENG proprietary designs and processes, this FPC antenna has excellent stability and sensitivity to consistently provide high signal reception efficiency. 5.Antenna Electrical Specifications : Characteristics Specifications Unit Outline Dimensions 25.17*11.2 *0.12 mm Frequency 2400~2500 MHz Impedance 50  Polarization Linear Polarization Return Loss Table Return Loss Freq.Band 2.4G Hz 2.45G Hz 2.5G Hz dB -16.98-29.8117.34 VSWR Table VSWR Freq.Band 2.4G Hz 2.45G Hz 2.5G Hz 1.32 1.08 1.29 GAIN Table Total Gain = Xpol + Ppol Freq.Band 2400MHz 2450MHz 2485MHz 2500MHz Peak Gain(dBi) 1.02 1.15 1.24 1.23 Tolerances (Unless otherwise specified) SHEN ZHEN YINGFENG ANTENNA TECHNOLOG YCO.,LTD X : ± 1 X.X : ± 0.1 X.XX : ± 0.01 Angle : ± Hole Dia. : ± Scale : Unit：mm THIS SPECIFICATION IS THE PROPERTY OF UNICTRON TECHNOLOGIES CORPORATION AND SHALL NOT BE REPRODUCED OR USED IN ALL CIRCUMSTANCES WITHOUT WRITTEN PERMISSION Drawn By : Shelley Checked By : Simon Designed By :Simon Approved By :Frank TITLE：BT FPC Antenna( NT35A-L/R) PART S2B4BB1F1B19000 REV. NO. A PAGE 3 OF 6 6．Dimensions (unit: mm) public errand：±0.2mm 7.Measurement Characteristics: (1)Return Loss (2)VSWR Tolerances (Unless otherwise specified) SHEN ZHEN YINGFENG ANTENNA TECHNOLOG YCO.,LTD X : ± 1 X.X : ± 0.1 X.XX : ± 0.01 Angle : ± Hole Dia. : ± Scale : Unit：mm THIS SPECIFICATION ISTHE PROPERTY OF UNICTRON TECHNOLOGIES CORPORATION AND SHALL NOT BE REPRODUCED OR USED INALL CIRCUMSTANCES WITHOUT WRITTEN PERMISSION Drawn By : Shelley Checked By : Simon Designed By :Simon Approved By :Frank TITLE：BT FPC Antenna( NT35A-L/R) PART S2B4BB1F1B19000 REV. NO. A PAGE 4 OF 6 8.Three D Radiation Pattern measurements Tolerances (Unless otherwise specified) SHEN ZHEN YINGFENG ANTENNA TECHNOLOG YCO.,LTD X : ± 1 X.X : ± 0.1 X.XX : ± 0.01 Angle : ± Hole Dia. : ± Scale : Unit：mm THIS SPECIFICATION IS THE PROPERTY OF UNICTRON TECHNOLOGIES CORPORATION AND SHALL NOT BE REPRODUCED OR USED IN ALL CIRCUMSTANCES WITHOUT WRITTEN PERMISSION Drawn By : Shelley Checked By : Simon Designed By :Simon Approved By :Frank TITLE：BT FPC Antenna( NT35A-L/R) PART S2B4BB1F1B19000 REV. NO. A PAGE 5 OF 6 9.Radiation Pattern 9-1.3D Gain Pattern (Radiation Pattern at 2450 MHz) 、 -Y -Z X Tolerances (Unless otherwise specified) SHEN ZHEN YINGFENG ANTENNA TECHNOLOG YCO.,LTD X : ± 1 X.X : ± 0.1 X.XX : ± 0.01 Angle : ± Hole Dia. : ± Scale : Unit：mm THIS SPECIFICATION IS THE PROPERTY OF UNICTRON TECHNOLOGIES CORPORATION AND SHALL NOT BE REPRODUCED OR USED IN ALL CIRCUMSTANCES WITHOUT WRITTEN PERMISSION Drawn By : Shelley Checked By : Simon Designed By :Simon Approved By :Frank TITLE：BT FPC Antenna( NT35A-L/R) PART S2B4BB1F1B19000 REV. NO. A PAGE 6 OF 6 9-2.2D Gain complete machine (Radiation Pattern at 2450 MHz) 9-3.complete machine Efficiency Table 10.Revision Control: Revision Date Content Remark A 2022-11-21 New Issued. N/A Frequency(MHz) 2400 2420 2450 2460 2480 2500 Efficiency (dB) -2.22-1.71 -2.09 -2.13 -2.24 -2.07 Efficiency (%) 27.9 29.3 30 29 28.7 26 Gain (dBi) 1.45 1.49 1.6 1.58 1.54 1.49

ProductName: TrueWirelessEarbuds RadiatedSpuriousEmissions ConductedEmissionsatACPowerLine(150kHz-30MHz)