2BTYV-YX66wireless bluetooth earphones

1/1 USAgentforServiceofProcessLETTEROFATTESTATION TO: OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USAgentforServiceofProcess: Companyname:HOPEKCORPORATIONINC FRN:0034562900 ContactName:YangyangXu Address:16755CoyoteBushDrUnit84,SanDiego,CA92127UnitedStates TelephoneNo:561-875-9826 Email:[email protected] Applicant: Companyname: ShenzhenGuanErshengElectronicsCo.,LTD. GranteeCode: 2BTYV FCCID: 2BTYV-YX66 FRN: 0037806437 ContactName: XingdingHe Address: BuildingA,No.332,GuiyueRoad,LonghuaDistrict,ShenzhenCity, GuangdongProvinceChina TelephoneNo: 13534266664 FaxNo: / Email: [email protected] ShenzhenGuanErshengElectronicsCo.,LTD.certifiesthat,asofthedateofthisfilingofthe applicationwiththeTCB,[HOPEKCORPORATIONINC]isourdesignatedUSagentforservice ofprocessfortheabovereferencedFCCID.ShenzhenGuanErshengElectronicsCo.,LTD. acceptstomaintainanagentfornolessthanoneyearafterthegranteehasterminatedall marketingandimportationortheconclusionofanycommissionrelatedproceedinginvolving equipment.[HOPEKCORPORATIONINC]accepts,asofthedateofthefilingoftheapplication, theobligationofthedesignatedUSagentforserviceofprocessfortheabovereferenceFCCID. TheUSAgentforServiceofProcessisawareofandagreestocomplywiththerequirements outlinedintheFCCEquipmentAuthorizationProgram,ReportandOrderFCC22-84,andclause §2.911. TheApplicantisawareofandagreestocomplywiththerequirementsoutlinedintheFCC EquipmentAuthorizationProgram,ReportandOrderFCC22-84,andclause§2.911. Date:2026-02-05 Applicant’sName: XingdingHe USAgent’sName:YangyangXu Title:generalmanagerTitle:manager Signature:Signature:

Shenzhen Guan Ersheng Electronics Co., LTD. Attestation Statements Not Covered Entity Applicant & Not Covered Equipment To: Federal Communications Commission Date: Jan. 4, 26 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(i) & (ii) FCC ID: 2BTYV-YX66 Shenzhen Guan Ersheng Electronics Co., LTD. (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List, established pursuant to § 1.50002 of reference chapter, as an entity producing “covered” communication equipment. The equipment for which authorization is sought is not “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List that prohibited from receiving an equipment authorization pursuant to section § 2.903 of the FCC rules. Sincerely yours, Applicant Signature Printed Name: Shenzhen Guan Ersheng Electronics Co., LTD. Title: general manager Address: Building A, No. 332, Guiyue Road,Longhua District,Shenzhen City, Guangdong Province China Tel.: 13534266664 Email: [email protected]

Shenzhen Guan Ersheng Electronics Co., LTD. 1 | P a g e Attestation Statements To: Federal Communications Commission Date: Jan. 4, 26 7435 Oakland Mills Road, Columbia, MD 21046, USA Subject: Attestation of Compliance with FCC Covered List Software Requirements FCC ID: [2BTYV-YX66] Product Name: [wireless bluetooth earphones] This letter serves as an attestation that the equipment identified above ☐ is / ☒ is not (select one) "covered" software as defined under the Federal Communications Commission (FCC) Covered List requirements, as outlined in FCC 22-84 and KDB 986446. Specifically, the undersigned certifies that the equipment for which authorization is sought: 1. Does not contain cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors, assignees, parents, subsidiaries, affiliates, or any entity that has rebranded or relabeled software produced by the aforementioned entities. 2. Does not have the capability to store, run, or deliver any software identified on the FCC Covered List, including but not limited to cybersecurity and anti-virus software. To support this attestation, the appendix evaluation documentation has been prepared and is included in the certification filing. This attestation is based on a thorough evaluation of the device's design, functionality, and software environment. The undersigned affirms that the information provided is accurate and complete to the best of their knowledge. Sincerely yours, Applicant Signature Printed Name: Xingding He Title: general manager Address: Building A, No. 332, Guiyue Road,Longhua District,Shenzhen City, Guangdong Province China Tel.: 13534266664 Email: [email protected] Shenzhen Guan Ersheng Electronics Co., LTD. 2 | P a g e Evaluation regarding to the Covered List Software: Compliance Methodology Evaluation Process Results Device is Inherent compliance ☒ The Chipset(s) used is limited to run the Cybersecurity or anti-virus software. Compliance ☒ The Memory used is limited to run the Cybersecurity or anti-virus software. Compliance ☒ There is storage capacity limitation for store or install the Cybersecurity or anti-virus software. Compliance ☒ Operating system used is limited to run, install or deliver the Cybersecurity or anti-virus software. Compliance Device is not Inherent compliance ☐ Evaluation Based on Software Bill of Materials (SBoM) See attached “SBoM“ Note:The SBoM content is limited to the scope of covered list software (e.g. antivirus and cybersecurity software). ☐ Evaluation Based on Scan for Software on the device ☐ Evaluation Based on Filesystem scan ☐ Evaluation Based on Running software check SBOM (Software Bill of Materials) Section Component Name Version Supplier 1 2 3

Shenzhen Guan Ersheng Electronics Co., LTD. Jan 04, 2025 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization for FCC ID: 2BTYV-YX66 I, the undersigned, hereby authorize Shenzhen PSI Testing Co., Ltd. to act on our behalf in all matters relating to this application for equipment certification. Any act carried out by Shenzhen PSI Testing Co., Ltd. shall have the same effect as our own and I acknowledge that all responsibility for complying with the terms and conditions of certification, as specified by DERYCOM CERTIFICATION SERVICES, INC., still resides with Shenzhen Guan Ersheng Electronics Co., LTD. We certify that we are not subject to a denial of federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862, and that no party to the application, as defined in 47 CFR §1.2002(b), is subject to a denial of federal benefits that includes FCC benefits pursuant to that section. Sincerely, Title： general manager Tel: 13534266664 Fax: / Email: [email protected]

Shenzhen Guan Ersheng Electronics Co., LTD. Jan 04, 2026 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request for: FCC ID: 2BTYV-YX66 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request permanent confidential treatment of the exhibits accompanying this certification application as outlined below :  Block Diagram  Schematics  Operational Description The above exhibits contain trade secrets and/or proprietary information that are not publicly available and materials that the Applicant has spent considerable efforts in developing. Public disclosure of these may be harmful to the Applicant and give an unfair advantage to competitors on the market. Pursuant to DA 04-1705, the applicant also requests temporary confidential treatment of the exhibits outlined below for a period of (up to 180) days from the date of equipment authorization and prior to marketing in the United States to prevent the premature release of any sensitive information. Applicant is aware of their responsibility to notify DERYCOM in the event information regarding the product or the product is made available to the public before the requested period has expired.  User Manual  Internal Photos  External Photos  Test Setup Photos Sincerely, Title: general manager Address: Building A, No. 332, Guiyue Road,Longhua District,Shenzhen City, Guangdong Province China Tel.: 13534266664 Email: [email protected]

FCC ID:2BTYV-YX66

Page 1 of 1 Report No.: psi2601073-C01-R01 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Appendix IV RF Exposure evaluation FCC ID: 2BTYV-YX66 According to 447498 D01 General RF Exposure Guidance v06 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 The result is rounded to one decimal place for comparison. EDR: Worse case output power is as below: [2480MHz: 1.40dBm] Maximum output power is 1.40dBm (1.38mW). (1.38mW /5mm)·[√2.480(GHz)]= 0.43<3.0 for 1-g SAR Then SAR evaluation is not required.

2.4GHz 2012 Chip Antenna: RANT2012F245X07 Dimension(mm) L2.05+-0.10 W1.20+-0.10 T0.65+-0.10 No.TerminalName 1Feeding/GNG 2GND Application: WLAN,802.11b/g,Bluetooth,WLAN,etc... Features SMD,highreliability,ultraImpact,Omni-directional... PartnumberInformation RANT2012F245X07 (A)(B)(C)(D)(E)(F) (A)ProductTypeChipAntenna (B)SizeCode2.0x1.2mm(+-0.2mm) (C)MaterialHighKmaterial (D)Frequency2.4~2.5GHz (E)FeedingmodePIFA&SingleFeeding (F)AntennatypeType=07 ElectricalSpecification WorkingFrequencyRange2400~2484MHz Bandwidth84(Min.) PeakGain1.7dBi(Typ.) Impedance50Ohm Returnloss10dB(Min) PolarizationLinear AzimuthBeamwidthOmni-directional OperationTemperature( °C )-40~85 °C ResistancetoSolderingHeats 10sec.(@280°C) TerminationNi/Au(Leadless) ThespecificationisdefinedonEVB. DimensionandTerminalConfiguration 咏成國際科技有限公司電話 :13530576606 RAINInternationalTechnologyCo.,Ltd. 7/F,BuildingF,ZhichuangPark,Tong'an,Gushu,Shenzhen 2.4GHz 2012 Chip Antenna: RANT2012F245X07 EvaluationBoardReference PCBDimensionAntennaLayoutReferenceUnit:mm ElectricalCharacteristics ReturnLoss ReturnLoss&Radiation 1 Frequency(MHz) S11(dB) 2400-10.77 2450-24.81 2484-10.243 Radiation Z Y X 2400MHz2450MHz2500MHz Efficiency70.56%75.25%71.01% 2.4GHz 2012 Chip Antenna: RANT2012F245X07 TapingSpecifications ReelandTapingSpecification ReelSpecification TYPESIZEABCD 20127”5K/Reel 9.0±0.5 60±213.5±0.5178±2 TappingSpecification PackagingTypeABWEFGHTDP PaperType2012 1.50±0.202.30±0.208.0±0.201.75±0.103.5±0.054.0±0.102.0±0.050.75±0.101.57±0.104.0±0.1 ReliabilityTabl 2.4GHz 2012 Chip Antenna: RANT2012F245X07 e TestItemProcedure Requirements CeramicType Remark (Reference) Electrical Characterization Fulfilltheelectrical specification UserSpec. Thermal Shock 1.Preconditioning: 50±10°C/1hr,thenkeepfor24±1hrsatroomtemp. 2.Initialmeasure:Spec:referInitialspec. 3.Rapidchangeoftemperaturetest: -30°Cto+85°C;100cycles; 15minutesatLowercategorytemperature; 15minutesatUppercategorytemperature. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 107 Temperature Cycling 1.Initialmeasure:Spec:referInitialspec. 2.100Cycles(-30°Cto+85°C),SoakMode=1(2Cycle/hours). 3.Measurementat24±2Hoursaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. JESD22 JA104 HighTemperature Exposure 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered;500hours@T=+85°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 LowTemperature Storage 1.Initialmeasure:Spec:referInitialspec. 2.Unpowered:500hours@T=-30°C. 3.Measurementat24±2hoursaftertest. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 108 Solderability (SMDBottomSide) Dippingmethod: a.Temperature:235±5°C b.Dippingtime:3±0.5s Thesoldershouldcover over95%ofthecritical areaofbottomside. IEC60384-21/22 4.10 SolderingHeat Resistance (RSH) Preheatingtemperature:150±10°C. Preheatingtime:1~2min. Soldertemperature:260±5°C. Dippingtime:5±0.5s NoVisibleDamage.IEC60384-21/22 4.10 Vibration5g'sfor20min.,12cycleseachof3orientations Note:Use8"X5"PCB.031"thick7securepointson,onelong sideand2securepointsatcornersofoppositesides.Parts mountedwithin2"fromanysecurepoint.Testfrom10-2000 Hz. NoVisibleDamage.MIL-STD-202 Method204 Mechanical Shock Threeshocksineachdirectionshallbeappliedalongthethree mutuallyperpendicularaxesofthetestspecimen(18shocks) Peakvalue:1,500g’s Duration:0.5ms Velocitychange:15.4ft/s Waveform:Half-sine NoVisibleDamage.MIL-STD-202 Method213 Humidity Bias 1.Humidity:85%R.H.,Temperature:85±2°C. 2.Time:500±24hours. 3.Measurementat24±2hrsaftertestcondition. NoVisibleDamage. Fulfilltheelectrical specification. MIL-STD-202 Method106 2.4GHz 2012 Chip Antenna: RANT2012F245X 2.4GHz 2012 Chip Antenna: RANT2012F245X07 07 _ Board Flex (SMD) 1.Mountingmethod: IR-Reflow.PCBSize(L:100×W:40×T:1.6mm) 2.Applytheloadindirectionofthearrowuntilbendingreaches 2mm. NoVisibleDamage.AEC-Q200 005 AdhesionForceof1.8Kgfor60seconds.NoVisibleDamage Magnificationof20Xor greatermaybeemployed forinspectionofthe mechanicalintegrityofthe devicebodyterminalsand body/terminaljunction. AEC-Q200 006 Physical Dimension Anyapplicablemethodusingx10magnification,micrometers, calipers,gauges,contourprojectors,orothermeasuring equipment,capableofdeterminingtheactualspecimen dimensions. Inaccordancewith specification. JESD22 JB100 RevisionHistory RevisionDateContent 1NewDatashee2022/10/15t

Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Page 1 of 65 Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China FCC TEST REPORT FCC ID: 2BTYV-YX66 On Behalf of Shenzhen Guan Ersheng Electronics Co., LTD. wireless bluetooth earphones Model No.: YX66 Prepared for : Shenzhen Guan Ersheng Electronics Co., LTD. Address : Building A, No. 332, Guiyue Road,Longhua District,Shenzhen City, Guangdong Province China Prepared By : Shenzhen PSI Testing Co., Ltd. Address : 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China Report Number : psi2601073-C01-R01 Date of Receipt : Dec10, 2025 Date of Test : Dec.11, 2025-Dec.18, 2025 Date of Report : January 12, 2026 Version Number : V0 Page 2 of 65 Report No.: psi2601073-C01-R01 Shenzhen PSI Testing Co., Ltd. Tel: 0755-23011775 | E-mail: [email protected] | http://www.psi-lab.com Add: 1-2/F., Building 5, Yudafu Industrial Park, No.10, Xingye West Road, Shajing Subdistrict, Bao'an District, Shenzhen, Guangdong, China TABLE OF CONTENTS Description Page 1. Summary Of Standards And Results............................................................................................ 6 1.1. Description of Standards and Results ..................................................................................... 6 2. General Information........................................................................................................................ 7 2.1. Description of Device (EUT) .................................................................................................... 7 2.2. Accessories of Device (EUT) .................................................................................................. 8 2.3. Tested Supporting System Details .......................................................................................... 8 2.4. Block Diagram of connection between EUT and simulators ................................................... 8 2.5. Test Mode Description ............................................................................................................. 9 2.6. Software test version and power setting information .............................................................. 9 2.7. Test Conditions ...................................................................................................................... 10 2.8. Test Facility ............................................................................................................................ 10 2.9. Measurement Uncertainty ..................................................................................................... 10 2.10. Test Equipment List ............................................................................................................... 11 3. Maximum Conducted Output Power ........................................................................................... 12 3.1. Test Limit ............................................................................................................................... 12 3.2. Test Procedure ...................................................................................................................... 12 3.3. Test Setup .............................................................................................................................. 12 3.4. Test Results ........................................................................................................................... 13 4. Occupied Bandwidth .................................................................................................................... 14 4.1. Test Limit ............................................................................................................................... 14 4.2. Test Procedure ...................................................................................................................... 14 4.3. Test Setup .............................................................................................................................. 15 4.4. Test Results ........................................................................................................................... 15 5. Carrier Frequency Separation ..................................................................................................... 19 5.1. Test Limit ............................................................................................................................... 19 5.2. Test Procedure ...................................................................................................................... 19 5.3. Test Setup .............................................................................................................................. 19 5.4. Test Results ........................................................................................................................... 20 6. Number Of Hopping Channel ...................................................................................................... 21 6.1. Limit ....................................................................................................................................... 21 6.2. Test Procedure ...................................................................................................................... 21 6.3. Test Setup .............................................................................................................................. 21 6.4. Test Results ........................................................................................................................... 22 7. Dwell Time ..................................................................................................................................... 24 7.1. Test limi…

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