2BSUAX02Watch Buds

Rev 1/26/2023 DONGGUAN IMOO TECHNOLOGY LIMITED Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: January 5, 2026 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID: 2BSUAX02 DONGGUAN IMOO TECHNOLOGY LIMITED (“the applicant”) certifies that, as of the date of the filing of the application,FCC US Agent, LLC is our designated U.S. agent for service of process for the above referenced FCC Applicant FRN:0037614773 ID. DONGGUAN IMOO TECHNOLOGY LIMITED accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. FCC US Agent, LLC accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Company Name: FCC US Agent, LLC FRN: 0033402884 Address: 3722 Illinois Avenue, Saint Charles, IL, 60174, USA Contact Person: Tim Payne Phone: 708-571-3148 Email: [email protected] Sincerely, DONGGUAN IMOO TECHNOLOGY LIMITED U.S. Agent: FCC US Agent, LLC Company Representative: Timothy WU Company Representative: Tim Payne Signature: Signature:

Rev 2/17/2023 DONGGUAN IMOO TECHNOLOGY LIMITED Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: January 5, 2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: 2BSUAX02 DONGGUAN IMOO TECHNOLOGY LIMITED (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. DONGGUAN IMOO TECHNOLOGY LIMITED (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24- 886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, Signature: Printed name: Timothy WU

Rev 2/17/2023 DONGGUAN IMOO TECHNOLOGY LIMITED Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: January 5, 2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: 2BSUAX02 DONGGUAN IMOO TECHNOLOGY LIMITED (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, Signature: Printed name: Timothy WU

Rev 11/20/07 DONGGUAN IMOO TECHNOLOGY LIMITED Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Confidentiality Request regarding application for certification of FCC ID: 2BSUAX02 Pursuant to Sections 0.457 and 0.459 of the Commission’s Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name (Block Diagram, Schematics, Operational Description) (Block Diagram.pdf, Schematics.pdf, Operational Description.pdf,) The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Pursuant to DA04-1705 June 15, 2004 of the Commission’s public notice, we also request that the information attached to this application be temporarily confidential for 180 days as outlined below: Exhibit Type File Name User Manual External photos Internal Photos Test Setup Photos User Manual.pdf, External photos.pdf Internal Photos.pdf, Test Setup Photos.PDF Sincerely, Signature: printed name: Timothy WU Date: January 5, 2026

G:\认证项目管理\认证项目管理\穿戴\NX02\FCC 签字文件_手环\FCC 签字文件_手环\FCC POA Letter.docx DONGGUAN IMOO TECHNOLOGY LIMITED Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Date: January 5, 2026 SUBJECT: FCC Application for (FCC ID: 2BSUAX02 ) To Whom It May Concern: We, the undersigned, hereby authorize Liting Nong at Centre Testing International Group Co., Ltd / Hongwei Industrial Park, Zone 70, Bao’an District, Shenzhen, Guangdong, China on our behalf, to apply to the Federal Communications Commission on our equipment. Any and all acts carried out by Liting Nong at Centre Testing International Group Co., Ltd / Hongwei Industrial Park, Zone 70, Bao’an District, Shenzhen, Guangdong, China on our behalf shall have the same effect as acts of our own. This is to advise that we are in full compliance with the Anti- Drug Abuse Act. We, the applicant, are not subject to a denial of federal benefits pursuant to Section 5301 of the Anti-Drug Act of 1988, 21 USC853a, and no party to the application is subject to a denial of federal benefits pursuant to that section Regards, Signature: printed name: Timothy WU

ReportNo.:EED32R81754703Page1of7 RFExposureEvaluationReport Product:WatchBuds Trademark:imoo Model/Typereference:E2502AOB SerialNumber:N/A ReportNumber:EED32R81754703 FCCID:2BSUAX02 DateofIssue:Dec.12,2025 TestStandards: 47CFRPart1.1307 47CFRPart1.1310 47CFRPart2.1093 KDB447498D04InterimGeneralRF ExposureGuidancev01 Testresult:PASS Preparedfor: DONGGUANIMOOTECHNOLOGYLIMITED Room1102,Building1,No.28,DongmenMiddleRoad,Chang'anTown, DongguanCity,GuangdongProvince，523850，China Preparedby: CentreTestingInternationalGroupCo.,Ltd. HongweiIndustrialPark,Zone70,Bao’anDistrict, Shenzhen,Guangdong,China TEL:+86-755-33683668 FAX:+86-755-33683385 Compiledby:Reviewedby: LucasLuKevenTan Approvedby:Date:Dec.12,2025 AaronMa CheckNo.:2527180925 ReportNo.:EED32R81754703Page2of7 1Contents Page 1CONTENTS........................................................................................................................................................................2 2GENERALINFORMATION..............................................................................................................................................3 2.1CLIENTINFORMATION...................................................................................................................................................3 2.2GENERALDESCRIPTIONOFEUT...................................................................................................................................3 2.3PRODUCTSPECIFICATIONSUBJECTIVETOTHISSTANDARD...........................................................................................3 2.4TESTLOCATION.............................................................................................................................................................4 2.5DEVIATIONFROMSTANDARDS......................................................................................................................................4 2.6ABNORMALITIESFROMSTANDARDCONDITIONS..........................................................................................................4 2.7OTHERINFORMATIONREQUESTEDBYTHECUSTOMER................................................................................................4 3SAREVALUATION...........................................................................................................................................................5 3.1RFEXPOSURECOMPLIANCEREQUIREMENT.................................................................................................................5 3.1.1Limits....................................................................................................................................................................5 3.1.2TestProcedure....................................................................................................................................................5 3.1.3EUTRFExposureEvaluation..........................................................................................................................6 ReportNo.:EED32R81754703Page3of7 2GeneralInformation 2.1ClientInformation Applicant: DONGGUANIMOOTECHNOLOGYLIMITED AddressofApplicant: Room1102,Building1,No.28,DongmenMiddleRoad,Chang'anTown, DongguanCity,GuangdongProvince，523850，China Manufacturer: DONGGUANIMOOTECHNOLOGYLIMITED AddressofManufacturer: Room1102,Building1,No.28,DongmenMiddleRoad,Chang'anTown, DongguanCity,GuangdongProvince，523850，China Factory: DongguanZackElectronicTechnologyCo.,Ltd. AddressofFactory: Room601，Building9,No.11,HumenSection,Tai'anRoad,HumenTown, DongguanCity,GuangdongProvinceChina 2.2GeneralDescriptionofEUT ProductName: WatchBuds ModelNo.(EUT): E2502AOB TradeMark: imoo 2.3 ProductSpecificationsubjectivetothisstandard FrequencyRange:BLE/BT:2402MHz~2480MHz ModulationType:BLE:GFSK BT:GFSK,π/4DQPSK,8DPSK TestPowerGrade:Default TestSoftwareofEUT:wvt_gui.exe AntennaType: FPCAntenna AntennaGain: -3.1dBi PowerSupply: Adapter: DC5V Battery: DC3.87V SampleReceivedDate: Sep.18,2025 SampletestedDate: Sep.18,2025toOct.27,2025 ReportNo.:EED32R81754703Page4of7 2.4TestLocation Alltestswereperformedat: CentreTestingInternationalGroupCo.,Ltd HongweiIndustrialPark,Zone70,Bao'anDistrict,Shenzhen,Guangdong,China Telephone:+86(0)75533683668Fax:+86(0)75533683385 Notestsweresub-contracted. FCCDesignationNo.:CN1164,TestFirmRegistrationNo.:260439 2.5DeviationfromStandards None. 2.6AbnormalitiesfromStandardConditions None. 2.7OtherInformationRequestedbytheCustomer None. ReportNo.:EED32R81754703Page5of7 3SAREvaluation 3.1RFExposureComplianceRequirement 3.1.1Limits TheSAR-basedexemptionformulaof§1.1307(b)(3)(i)(B),repeatedhereasFormula(B.2),appliesfor singlefixed,mobile,andportableRFsourceswithavailablemaximumtime-averagedpoweroreffective radiatedpower(ERP),whicheverisgreater,oflessthanorequaltothethresholdPth(mW). Thismethodshallonlybeusedatseparationdistancesfrom0.5cmto40cmandatfrequenciesfrom 0.3GHzto6GHz(inclusive).PthisgivenbyFormula andfisinGHz,distheseparationdistance(cm),andERP20cmisperFormula(B.1). The1mWBlanketExemptionof§1.1307(b)(3)(i)(A)appliesforsinglefixed,mobile,andportableRF sourceswithavailablemaximumtime-averagedpowerofnomorethan1mW,regardlessofseparation distance. 3.1.2TestProcedure SoftwareprovidedbyclientenabledtheEUTtotransmitandreceivedataatlowest,middleandhighest channelindividually. ReportNo.:EED32R81754703Page6of7 3.1.3EUTRFExposureEvaluation ForStandalone: Note： ①EIRP=conductedpower+antennagain； ②ERP=EIRP-2.15; ③EIRP(dBm)=Fieldstrengthofthefundamentalsignal(dBuV/m@3m)–95.23; ④ERP(mW)=10^(ERP(dBm)/10); ⑤Theestimationdistanceis0.5cm; ⑥ThetestdatapleaserefertothereportofEED32R81754701,EED32R81754702andonlytheworstcase datawasrecordedinthereport. ReportNo.:EED32R81754703Page7of7 Statement 1.Thisreportisconsideredinvalidwithoutapprovedsignature,specialsealandthesealontheperforation; 2.TheCompanyNameshownonReportandAddress,thesample(s)andsampleinformationwas/were providedbytheapplicantwhoshouldberesponsiblefortheauthenticitywhichCTIhasn'tveri…

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ReportNo.:EED32R81754701Page1of34 Appendix:BluetoothLE ReportNo.:EED32R81754701Page2of34 Contents DutyCycle...........................................................................................................................................................................................................3 MaximumPeakConductedOutputPower.........................................................................................................................................................7 -6dBBandwidth.................................................................................................................................................................................................11 OccupiedChannelBandwidth..........................................................................................................................................................................15 MaximumPowerSpectralDensityLevel.........................................................................................................................................................19 BandEdge.........................................................................................................................................................................................................23 ConductedRFSpuriousEmission...................................................................................................................................................................28 ReportNo.:EED32R81754701Page3of34 DutyCycle ConditionModeFrequency(MHz)AntennaDutyCycle(%)CorrectionFactor(dB)1/T(kHz) NVNTBLE1M2402Ant185.50.680.47 NVNTBLE1M2440Ant185.50.680.47 NVNTBLE1M2480Ant185.60.680.47 NVNTBLE2M2402Ant186.430.630.92 NVNTBLE2M2440Ant186.60.620.92 NVNTBLE2M2480Ant186.40.630.93 ReportNo.:EED32R81754701Page4of34 TestGraphs DutyCycleNVNTBLE1M2402MHzAnt1 DutyCycleNVNTBLE1M2440MHzAnt1 ReportNo.:EED32R81754701Page5of34 DutyCycleNVNTBLE1M2480MHzAnt1 DutyCycleNVNTBLE2M2402MHzAnt1 ReportNo.:EED32R81754701Page6of34 DutyCycleNVNTBLE2M2440MHzAnt1 DutyCycleNVNTBLE2M2480MHzAnt1 ReportNo.:EED32R81754701Page7of34 MaximumPeakConductedOutputPower ConditionModeFrequency (MHz) AntennaConductedPower (dBm) Limit (dBm) Verdict NVNTBLE1M2402Ant1-0.4230Pass NVNTBLE1M2440Ant1-0.0530Pass NVNTBLE1M2480Ant10.2630Pass NVNTBLE2M2402Ant1-0.5930Pass NVNTBLE2M2440Ant1-0.2530Pass NVNTBLE2M2480Ant10.0530Pass ReportNo.:EED32R81754701Page8of34 TestGraphs PeakPowerNVNTBLE1M2402MHzAnt1 PeakPowerNVNTBLE1M2440MHzAnt1 ReportNo.:EED32R81754701Page9of34 PeakPowerNVNTBLE1M2480MHzAnt1 PeakPowerNVNTBLE2M2402MHzAnt1 ReportNo.:EED32R81754701Page10of34 PeakPowerNVNTBLE2M2440MHzAnt1 PeakPowerNVNTBLE2M2480MHzAnt1 ReportNo.:EED32R81754701Page11of34 -6dBBandwidth ConditionModeFrequency(MHz)Antenna-6dBBandwidth(MHz)Limit-6dBBandwidth(MHz)Verdict NVNTBLE1M2402Ant10.6640.5Pass NVNTBLE1M2440Ant10.6670.5Pass NVNTBLE1M2480Ant10.6660.5Pass NVNTBLE2M2402Ant11.1390.5Pass NVNTBLE2M2440Ant11.140.5Pass NVNTBLE2M2480Ant11.1410.5Pass ReportNo.:EED32R81754701Page12of34 TestGraphs -6dBBandwidthNVNTBLE1M2402MHzAnt1 -6dBBandwidthNVNTBLE1M2440MHzAnt1 ReportNo.:EED32R81754701Page13of34 -6dBBandwidthNVNTBLE1M2480MHzAnt1 -6dBBandwidthNVNTBLE2M2402MHzAnt1 ReportNo.:EED32R81754701Page14of34 -6dBBandwidthNVNTBLE2M2440MHzAnt1 -6dBBandwidthNVNTBLE2M2480MHzAnt1 ReportNo.:EED32R81754701Page15of34 OccupiedChannelBandwidth ConditionModeFrequency(MHz)Antenna99%OBW(MHz) NVNTBLE1M2402Ant11.058 NVNTBLE1M2440Ant11.056 NVNTBLE1M2480Ant11.037 NVNTBLE2M2402Ant11.937 NVNTBLE2M2440Ant11.939 NVNTBLE2M2480Ant11.94 ReportNo.:EED32R81754701Page16of34 TestGraphs OBWNVNTBLE1M2402MHzAnt1 OBWNVNTBLE1M2440MHzAnt1 ReportNo.:EED32R81754701Page17of34 OBWNVNTBLE1M2480MHzAnt1 OBWNVNTBLE2M2402MHzAnt1 ReportNo.:EED32R81754701Page18of34 OBWNVNTBLE2M2440MHzAnt1 OBWNVNTBLE2M2480MHzAnt1 ReportNo.:EED32R81754701Page19of34 MaximumPowerSpectralDensityLevel ConditionModeFrequency (MHz) AntennaConductedPSD (dBm/3kHz) Limit (dBm/3kHz) Verdict NVNTBLE1M2402Ant1-16.088Pass NVNTBLE1M2440Ant1-15.778Pass NVNTBLE1M2480Ant1-15.458Pass NVNTBLE2M2402Ant1-19.268Pass NVNTBLE2M2440Ant1-19.118Pass NVNTBLE2M2480Ant1-18.718Pass ReportNo.:EED32R81754701Page20of34 TestGraphs PSDNVNTBLE1M2402MHzAnt1 PSDNVNTBLE1M2440MHzAnt1 ReportNo.:EED32R81754701Page21of34 PSDNVNTBLE1M2480MHzAnt1 PSDNVNTBLE2M2402MHzAnt1 ReportNo.:EED32R81754701Page22of34 PSDNVNTBLE2M2440MHzAnt1 PSDNVNTBLE2M2480MHzAnt1 ReportNo.:EED32R81754701Page23of34 BandEdge ConditionModeFrequency(MHz)AntennaMaxValue(dBc)Limit(dBc)Verdict NVNTBLE1M2402Ant1-54.9-20Pass NVNTBLE1M2480Ant1-55.5-20Pass NVNTBLE2M2402Ant1-41.25-20Pass NVNTBLE2M2480Ant1-54.96-20Pass ReportNo.:EED32R81754701Page24of34 TestGraphs BandEdgeNVNTBLE1M2402MHzAnt1Ref BandEdgeNVNTBLE1M2402MHzAnt1Emission ReportNo.:EED32R81754701Page25of34 BandEdgeNVNTBLE1M2480MHzAnt1Ref BandEdgeNVNTBLE1M2480MHzAnt1Emission

ReportNo.:EED32R81754701Page26of34 BandEdgeNVNTBLE2M2402MHzAnt1Ref BandEdgeNVNTBLE2M2402MHzAnt1Emission ReportNo.:EED32R81754701Page27of34 BandEdgeNVNTBLE2M2480MHzAnt1Ref BandEdgeNVNTBLE2M2480MHzAnt1Emission ReportNo.:EED32R81754701Page28of34 ConductedRFSpuriousEmission ConditionModeFrequency(MHz)AntennaMaxValue(dBc)Limit(dBc)Verdict NVNTBLE1M2402Ant1-48.3-20Pass NVNTBLE1M2440Ant1-48.2-20Pass NVNTBLE1M2480Ant1-48.33-20Pass NVNTBLE2M2402Ant1-46.63-20Pass NVNTBLE2M2440Ant1-47.7-20Pass NVNTBLE2M2480Ant1-48.49-20Pass ReportNo.:EED32R81754701Page29of34 TestGraphs Tx.SpuriousNVNTBLE1M2402MHzAnt1Ref Tx.SpuriousNVNTBLE1M2402MHzAnt1Emission ReportNo.:EED32R81754701Page30of34 Tx.SpuriousNVNTBLE1M2440MHzAnt1Ref Tx.SpuriousNVNTBLE1M2440MHzAnt1Emission ReportNo.:EED32R81754701Page31of34 Tx.SpuriousNVNTBLE1M2480MHzAnt1Ref Tx.SpuriousNVNTBLE1M2480MHzAnt1Emission ReportNo.:EED32R81754701Page32of34 Tx.SpuriousNVNTBLE2M2402MHzAnt1Ref Tx.SpuriousNVNTBLE2M2402MHzAnt1Emission ReportNo.:EED32R81754701Page33of34 Tx.SpuriousNVNTBLE2M2440MHzAnt1Ref Tx.SpuriousNVNTBLE2M2440MHzAnt1Emission ReportNo.:EED32R81754701Page34of34 Tx.SpuriousNVNTBLE2M2480MHzAnt1Ref Tx.SpuriousNVNTBLE2M2480MHzAnt1Emission ***EndofReport***

ReportNo.:EED32R81754701Page 1 of 50 TESTREPORT Product:WatchBuds Trademark:imoo Model/Typereference:E2502AOB SerialNumber:N/A ReportNumber:EED32R81754701 FCCID:2BSUAX02 DateofIssue:Dec.12,2025 TestStandards:47CFRPart15SubpartC Testresult:PASS Preparedfor: DONGGUANIMOOTECHNOLOGYLIMITED Room1102,Building1,No.28,DongmenMiddleRoad,Chang'anTown, DongguanCity,GuangdongProvince，523850，China Preparedby: CentreTestingInternationalGroupCo.,Ltd. HongweiIndustrialPark,Zone70,Bao’anDistrict, Shenzhen,Guangdong,China TEL:+86-755-33683668 FAX:+86-755-33683385 Compiledby:Reviewedby: LucasLuKevenTan Approvedby:Date:Dec.12,2025 AaronMa CheckNo.:2527180925 ReportNo.:EED32R81754701Page 2 of 50 1Content 1CONTENT............................................................................................................................................................................2 2TESTSUMMARY...............................................................................................................................................................3 3GENERALINFORMATION...............................................................................................................................................4 3.1CLIENTINFORMATION....................................................................................................................................................4 3.2GENERALDESCRIPTIONOFEUT.................................................................................................................................4 3.3TESTCONFIGURATION..................................................................................................................................................5 3.4TESTENVIRONMENT.....................................................................................................................................................6 3.5DESCRIPTIONOFSUPPORTUNITS...............................................................................................................................6 3.6TESTLOCATION.............................................................................................................................................................6 3.7MEASUREMENTUNCERTAINTY(95%CONFIDENCELEVELS,K=2).............................................................................7 4EQUIPMENTLIST..............................................................................................................................................................8 5TESTRESULTSANDMEASUREMENTDATA.........................................................................................................11 5.1ANTENNAREQUIREMENT............................................................................................................................................11 5.2CONDUCTEDEMISSIONS.............................................................................................................................................12 5.3MAXIMUMCONDUCTEDOUTPUTPOWER..................................................................................................................16 5.4DTSBANDWIDTH........................................................................................................................................................17 5.5MAXIMUMPOWERSPECTRALDENSITY.....................................................................................................................18 5.6BANDEDGEMEASUREMENTSANDCONDUCTEDSPURIOUSEMISSION...................................................................19 5.7RADIATEDSPURIOUSEMISSION&RESTRICTEDBANDS...........................................................................................20 6APPENDIXA.....................................................................................................................................................................39 7PHOTOGRAPHSOFTESTSETUP..............................................................................................................................40 8PHOTOGRAPHSOFEUTCONSTRUCTIONALDETAILS.....................................................................................42 ReportNo.:EED32R81754701Page 3 of 50 2TestSummary TestItemTestRequirementResult AntennaRequirement 47CFRPart15SubpartCSection 15.203/15.247(c) PASS ACPowerLineConducted Emission 47CFRPart15SubpartCSection 15.207 PASS DTSBandwidth 47CFRPart15SubpartCSection 15.247(a)(2) PASS MaximumConductedOutput Power 47CFRPart15SubpartCSection 15.247(b)(3) PASS MaximumPowerSpectral Density 47CFRPart15SubpartCSection15.247(e)PASS BandEdgeMeasurements 47CFRPart15SubpartCSection 15.247(d) PASS ConductedSpuriousEmissions 47CFRPart15SubpartCSection 15.247(d) PASS RadiatedSpuriousEmission& Restrictedbands 47CFRPart15SubpartCSection 15.205/15.209 PASS ReportNo.:EED32R81754701Page 4 of 50 3GeneralInformation 3.1ClientInformation Applicant:DONGGUANIMOOTECHNOLOGYLIMITED AddressofApplicant:Room1102,Building1,No.28,DongmenMiddleRoad,Chang'anTown, DongguanCity,GuangdongProvince，523850，China Manufacturer:DONGGUANIMOOTECHNOLOGYLIMITED AddressofManufacturer:Room1102,Building1,No.28,DongmenMiddleRoad,Chang'anTown, DongguanCity,GuangdongProvince，523850，China Factory:DongguanZackElectronicTechnologyCo.,Ltd. AddressofFactory: Room601，Building9,No.11,HumenSection,Tai'anRoad,Humen Town,DongguanCity,GuangdongProvinceChina 3.2GeneralDescriptionofEUT ProductName: WatchBuds ModelNo.: E2502AOB TestModelNo.: E2502AOB Trademark: imoo ProductType: MobilePortableFixLocation OperationFrequency: 2402MHz~2480MHz ModulationType: GFSK TransferRate:1Mbps,2Mbps NumberofChannel: 40 AntennaType: FPCAntenna AntennaGain: -3.1dBi PowerSupply: Adapter:DC5V Battery:DC3.87V TestVoltage: DC3.87V SampleReceivedDate:Sep.18,2025 SampletestedDate:Sep.18,2025toOct.27,2025 ReportNo.:EED32R81754701Page 5 of 50 OperationFrequencyeachofchannel Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) Channel Frequency (MHz) 02402102422202442302462 1240411242421244431…

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文件编号：QX-FM-EN-M4 保存年限：2年 ShenzhenQinxinTechnologyCo.,LTD ANTENNAAPPROVALSHEET customer name Zhakecomsenzlnc Project frequenc yband BT projectnameZK-2450Tabdate2025/10/21 AntennaformFPC date changed -- Customer material number zk2450-L-R Zk-2450-BT orderof the edition 1.0 TheRFEngineer/ RF HuangWenbo construction engineer/MD Xiao-pingye projectmanager /PM Customer confirmation 深圳市勤新科技有限公司 SHENZHENQINXININDUSTRY CO.,LTD 中国广东省深圳市宝安区石岩街道永兴街5 号德雨大厦3楼 电话：0755-28404650 传真：0755-28404639 公司邮箱：[email protected] 公司网址：www.sz-qinxin.com 邮编：518000 3rdFloor,DeyuBuilding,No.5Yongxin Street,ShiyanStreet,Bao'anDistrict, Shenzhen, TEL:28404650FAX:0755-28404639 E-Mail:[email protected] Website:www.sz-qinxin.com PostCode:518000 文件编号：QX-FM-EN-M4 -1- Theantennatestenvironment Externaltestenvironment Ourmaintestequipmentisshowninthetablebelow. Table2-2.Maintestequipment order number devicenameDevicepictures Measuremen tindex operational environment 1 Agilent8960 Integrated tester Active performanc e Normal temperature andhumidity 2 Microwave darkroom 3 ADVANTEST R3765BH Network analyzer Passive performanc e Thereisno largemetal aroundit Normal temperature andhumidity 文件编号：QX-FM-EN-M4 -2- 2.1.1Apassivetest Theconnectionofthetestdeviceis:networkanalyzertestlinetestequipment. 2.1.2Activetesting Themainperformanceindicatorsofactivetesting:totalradiationpower(TRP), omnidirectionalsensitivity(TIS). Testsite Microwavedarkroom:thefrequencyrangeis700MHz-6GHz,thestaticarearangeis50cm circumference,andthereflectivityislessthan-50dB. Testinstrument Networkanalyzer,CMW500,standardhornantenna,GTS1800testsystem,printer,etc. 文件编号：QX-FM-EN-M4 -3- Efficiencygainandradiationpatternofantenna 文件编号：QX-FM-EN-M4 -4- 文件编号：QX-FM-EN-M4 -5- 6、assemblydrawing： 文件编号：QX-FM-EN-M4 -6- 文件编号：QX-FM-EN-M4 -7-