2BBXJ-YK16smart watch

Rev1/26/2023 (ShenzhenYongshiIntelligentCo.,LTD) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:2025-12-10 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2BBXJ-YK16 (ShenzhenYongshiIntelligentCo.,LTD)certifiesthattheequipmentforwhichauthorizationissought isnot“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuanttosection 2.903oftheFCCrules. (ShenzhenYongshiIntelligentCo.,LTD)certifiesthattheequipmentforwhichauthorizationissought doesnotincludecybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab,Inc.orany ofitssuccessorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyofits successorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446 D01CoveredEquipmentGuidancesectionB(2a). Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, (JackXie) Rev1/26/2023 (ShenzhenYongshiIntelligentCo.,LTD) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:2025-12-10 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2BBXJ-YK16 (ShenzhenYongshiIntelligentCo.,LTD)certifiesthat,asofthedateofthefilingoftheapplication,the applicantisnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofitssubsidiariesor affiliates)asanentityproducing“covered”equipment. Sincerely, (JackXie)

Shenzhen Yongshi Intelligent Co., LTD U.S. Agent Letter of Attestation 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Attestation Statement – Part To: Federal Communications Commission Date: Nov 27, 2025 2.911(d)(7) filing Shenzhen Yongshi Intelligent Co., LTD(“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. The applicant further acknowledges it is our responsibility to inform the FCC FCC ID: 2BBXJ-YK16 whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Company Name: Shenzhen Yongshi Intelligent Co., LTD FRN: 0033968298 Address: A305, Building A6-6, No. 20, Gangtou Road, Bogang Community, Shajing Street, Bao 'an District, Shenzhen, Guangdong, China Signature: Contact Person: Jack Xie Tel: 13824302018 Email: [email protected]

ShenzhenYongshiIntelligentCo.,LTD OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:December10,2025 Subject;RequestforConfidentiality FCCID:2BBXJ-YK16 ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthese documentsmightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantage inthemarket. SchematicDiagram BlockDiagram PartsList OperationalDescription Tune-upProcedure SoftwareSecurityRequirementsforUNIIdevices Inadditionaltoabovementioneddocuments,inordertocomplywiththemarketingregulations inTitle47CFR§2.803andtheimportationrulesinTitle47CFR§2.1204,whileensuringthat businesssensitiveinformationremainsconfidentialuntiltheactualmarketingofnewly authorizeddevices,werequestShortTermConfidentialityofthefollowingattachment(s); ExternalPhotos TestSetupPhotos InternalPhotos UserManual For45days,pursuanttoPublicNoticeDA04-1705. OR For180dayspursuanttoKDB726920D01. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:JackXie Title:Manager

ShenzhenYongshiIntelligentCo.,LTD Date：2025-12-10 ProductModelNumber:YK16 FCCID：2BBXJ-YK16 Towhomitmayconcern Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatQAILaboratoriesLtd.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyQAILaboratoriesLtd.onour behalfshallhavethesameeffectasactsofourown. By: ContactListedonFCCWesbite Title:Manager Email:[email protected] Telephone:13824302018 Onbehalfof:ShenzhenYongshiIntelligentCo.,LTD

Project:YK16Author: Haiou.Zhu FileName: YK16_APP_A.doc Date:2025-11-25 Revision:A CONFIDENTIAL ShenzhenOnePlusOneWirelessCommunicationTechnologyCo.,Ltd. address：Room106,BuildingA1,HangchengInnovationandEntrepreneurshipPark,XixiangStreet,Baoan District,Shenzhen Page 1 of 6 1 深圳市一加一无线通讯技术有限公司 ShenzhenYijiaojiaWirelessCommunication TechnologyCo.,Ltd. 承认书 APPROVALSHEET 客户 Customer永时智能YongshiIntelligentTechnology 项目名 ProjectYK16 料号 PartNO. 规格 SpecificationBTAntennas Project:YK16Author: Haiou.Zhu FileName: YK16_APP_A.doc Date:2025-11-25 Revision:A CONFIDENTIAL ShenzhenOnePlusOneWirelessCommunicationTechnologyCo.,Ltd. address：Room106,BuildingA1,HangchengInnovationandEntrepreneurshipPark,XixiangStreet,Baoan District,Shenzhen Page 2 of 6 2 Date:Revision:Updatesandchanges:Issuedby: 2025.01.20AInitialsheetHaiou.Zhu Contents 1ANTENNADESCRIPTION...................................................................................3 1.1Partnumber.........................................................................................3 2ELECTRICALPERFORMANCE...........................................................................3 2.1Specification.........................................................................................3 2.2MeasurementSet-up...........................................................................4 3REFERENCEMEASUREMENTDATA................................................................5 3.1Passive...................................................................................................5 3.2Active....................................................................................................5 APPROVAL OnePlusOne: RFCheckMECheckQCCheckConfirmBy Customer: EECheckPMCheckQCCheckConfirmBy 承认鉴章后请寄回承认书一份 Pleasereturntousonecopyof“APPROVALSHEET”withyourapprovedsignatures Pl Project:YK16Author: Haiou.Zhu File Name: YK1 6_APP_A.doc Date: 2025 -11 -2 5 Rev ision:A CONFIDENTIAL ShenzhenOnePlusOneWirelessCommunicationTechnologyCo.,Ltd. address：Room 106, BuildingA1, HangchengInnovationand EntrepreneurshipPark, XixiangStreet, Baoan District,Shenzhen Page 2-3 of 6 2-3 1 Antenna description It summarize BT antennas for project YK16.BT antenna’s frequency band is 2400-2500MHz.BT antenna’s type is Metal antenna 1.1 Part number Part numberof antenna： YK1 6 -BT Antennapictures 2 ElectricalPerformance 2.1 Specification BT FrequencyRange 2400MHz~2500MHz <- 5 >25% ReturnLoss Efficiency Project:YK16Author: Haiou.Zhu FileName: YK16_APP_A.doc Date:2025-11-25 Revision:A CONFIDENTIAL ShenzhenOnePlusOneWirelessCommunicationTechnologyCo.,Ltd. address：Room106,BuildingA1,HangchengInnovationandEntrepreneurshipPark,XixiangStreet,Baoan District,Shenzhen Page 2-4 of 6 2-4 2.2MeasurementSet-up VSWRandReturnLoss VSWRmeasurements(S 11 )wereperformedusinganAgilentENAseriesNetworkAnalyzerandthepreviously describedtestfixture.Coaxialchokeswereusedtomitigatesurfacecurrentsontheoutsideofthecabling.The testingwasperformedinfreespace. Project:YK16Author: Haiou.Zhu FileName: YK16_APP_A.doc Date:2025-11-25 Revision:A CONFIDENTIAL ShenzhenOnePlusOneWirelessCommunicationTechnologyCo.,Ltd. address：Room106,BuildingA1,HangchengInnovationandEntrepreneurshipPark,XixiangStreet,Baoan District,Shenzhen Page 3-5 of 6 3-5 3Referencemeasurementdata Active Project:YK16Author: Haiou.Zhu FileName: YK16_APP_A.doc Date:2025-11-25 Revision:A CONFIDENTIAL ShenzhenOnePlusOneWirelessCommunicationTechnologyCo.,Ltd. address：Room106,BuildingA1,HangchengInnovationandEntrepreneurshipPark,XixiangStreet,Baoan District,Shenzhen Page 3-1 of 6

ShenzhenYongshiIntelligentCo.,LTD ProductSimilarityDeclaration Productname:smartwatch Modelname:YK16 FCCID:2BBXJ-YK16 We(ShenzhenYongshiIntelligentCo.,LTD)herebystatethatall themodelsareelectricalidenticalincludingthesamesoftware parameterandhardwaredesign(i.e.,circuitdesign,PCBLayout, RFmodule/circuit,antennatype(s)andantennalocation, componentsonPCB,etc.,),samemechanicalstructureand design(includingproductenclosure,materials,etc.,),Themodel hastwocolors.theseproductaresamePCBLayout,Schematics, BOM.OnlyfordifferentappearancecolorandWatchstrapfor differentmarketrequire. Signature: Name:JackXie Title:Manager Place:A305,BuildingA6-6,No.20,GangtouRoad,BogangCommunity,ShajingStreet,Bao 'anDistrict,Shenzhen,Guangdong,China Date:2025-12-10

Size:20*12mm M/N:YK16 FCCID:2BBXJ-YK16 Labellocation

Page 1 of4 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01RF RFTESTREPORT ReportReferenceNo........................:MAX25110148P01-R01RF FCCID.................................................:2BBXJ-YK16 Compiledby (position+printedname+signature) .. : Engineer/CindyZheng Supervisedby (position+printedname+signature)..: Manager/HaleyWen Approvedby (position+printedname+signature)..: RFManager/VivianJiang Dateofissue ......................................... :December5,2025 TestingLaboratoryName ................ : MAXLABTestingCo.,Ltd. Address ................................................. : 1/F,BuildingB,XinshidaiGRPark,ShiyanStreet,Bao'anDistrict, Shenzhen,Guangdong,518052,People’sRepublicofChina Applicant’sname...............................: ShenzhenYongshiIntelligentCo.,LTD Address.................................................: A305,BuildingA6-6,No.20,GangtouRoad,BogangCommunity, ShajingStreet,Bao'anDistrict,Shenzhen,Guangdong,China Testspecification..............................: Standard................................................:KDB447498D01GeneralRFExposureGuidancev06 MAXLABTestingCo.,Ltd..Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe MAXLABTestingCo.,Ltd..isacknowledgedascopyrightownerandsourceofthematerial.MAXLAB TestingCo.,Ltd..takesnoresponsibilityforandwillnotassumeliabilityfordamagesresultingfromthe reader'sinterpretationofthereproducedmaterialduetoitsplacementandcontext. Equipmentdescription.....................:smartwatch TradeMark ............................................ : yongshi Manufacturer.........................................: ShenzhenYongshiIntelligentCo.,LTD Model/Typereference ......................... : YK16 ListedModels ...................................... : N/A Modulation ........................................... :GFSK Frequency..............................................From2402MHzto2480MHz Rating.....................................................:DC3.85VFromBattery Result.....................................................:PASS Page 2 of4 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01RF RFEXPOSUREEVALUATIONMETHOD AccordingtoKDB447498D01GeneralRFExposureGuidancev06,Unlessspecificallyrequiredbythe publishedRFexposureKDBprocedures,standalone1-gheadorbodyand10-gextremitySARevaluation forgeneralpopulationexposureconditions,bymeasurementornumericalsimulation,isnotrequiredwhen thecorrespondingSARTestExclusionThresholdcondition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤50mm,the1-gand10-gSARtestexclusion thresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance,mm)]·[√f (GHz) ] ≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f (GHz) istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison AccordingtoFCC1.1310:Thecriterialistedinthefollowingtableshallbeusedto evaluatetheenvironmentimpactofhumanexposuretoradiofrequency(RF)Radiation asspecifiedin§1.1307(b) EUTSpecification Frequencyband (Operating) WLAN:2.412GHz~2.462GHz WLAN:5.150GHz~5.250GHz WLAN:5.725GHz~5.850GHz OthersBT:2402-2480MHz DevicecategoryPortable(<20cmseparation) Mobile(>20cmseparation) Others ExposureclassificationOccupational/Controlledexposure(S=5mW/cm2) GeneralPopulation/Uncontrolledexposure(S=1mW/cm 2 ) AntennadiversitySingleantenna Multipleantennas Txdiversity Rxdiversity Tx/Rxdiversity Max.outputpower1.685dBm(0.00147W) Antennagain(Max)-1.87dBi EvaluationappliedMPEEvaluation SAREvaluation Page 3 of4 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01RF RFEXPOSUREEVALUATIONMETHOD SARTestExclusionThresholdsfor100MHz – 6GHzand ≤ 50mm ApproximateSARTestExclusionPowerThresholdsatSelectedFrequenciesandTestSeparation DistancesareillustratedinthefollowingTable. The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparation distances ≤ 50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]·[√f(GHz)]≤3.0for1-gSARand≤7.5for10-gextremitySAR,where f(GHz)istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50 mmandfortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtest separationdistanceis<5mm,adistanceof5mmisappliedtodetermineSARtest exclusion. Page 4 of4 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01RF Maximummeasuredtransmitterpower. BLE Operating Mode Frequency Measur ed Power max. power Antenna Gain min.test separation distance [√f(GHz)] ResultLimit (MHz)(dBm)(mW)(dBi)(mm) GFSK 24021.6851.47-1.8751.5500.45693 24401.4261.39-1.8751.5620.43383 24801.3811.37-1.8751.5750.43293 The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparation distances≤50mmaredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparation distance,mm)]·[√f(GHz)] ThetestResultislessthan3.0for1-gSARand≤7.5for10-gextremitySAR. Conclusion:NoSARisrequired.

Page 1 of31 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01 FCCPART15SUBPARTCTESTREPORT FCCPART15.247 ReportReferenceNo........................:MAX25110148P01-R01 FCCID. ................................................ :2BBXJ-YK16 Compiledby (position+printedname+signature)..: Engineer/CindyZheng Supervisedby (position+printedname+signature) .. : Manager/HaleyWen Approvedby (position+printedname+signature)..: RFManager/VivianJiang Dateofissue.........................................:December5,2025 TestingLaboratoryName................: MAXLABTestingCo.,Ltd. Address ................................................. : 1/F,BuildingB,XinshidaiGRPark,ShiyanStreet,Bao'anDistrict, Shenzhen,Guangdong,518052,People’sRepublicofChina Applicant’sname ............................... : ShenzhenYongshiIntelligentCo.,LTD Address.................................................: A305,BuildingA6-6,No.20,GangtouRoad,BogangCommunity, ShajingStreet,Bao'anDistrict,Shenzhen,Guangdong,China Testspecification .............................. : Standard ................................................ :FCCPart15.247 MAXLABTestingCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe MAXLABTestingCo.,Ltd.isacknowledgedascopyrightownerandsourceofthematerial.MAXLAB TestingCo.,Ltd.takesnoresponsibilityforandwillnotassumeliabilityfordamagesresultingfromthe reader'sinterpretationofthereproducedmaterialduetoitsplacementandcontext. Equipmentdescription ..................... :smartwatch TradeMark............................................: yongshi Manufacturer.........................................: ShenzhenYongshiIntelligentCo.,LTD Model/Typereference.........................: YK16 ListedModels......................................: N/A Modulation...........................................:GFSK Frequency .............................................. From2402MHzto2480MHz Rating ..................................................... :DC3.85VFromBattery Result ..................................................... :PASS Page 2 of31 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01 TESTREPORT EquipmentunderTest:smartwatch Model/Type:YK16 ListedModels:N/A ModelDeclaration:N/A Applicant : ShenzhenYongshiIntelligentCo.,LTD Address: A305,BuildingA6-6,No.20,GangtouRoad,BogangCommunity, ShajingStreet,Bao'anDistrict,Shenzhen,Guangdong,China Manufacturer : ShenzhenYongshiIntelligentCo.,LTD Address: A305,BuildingA6-6,No.20,GangtouRoad,BogangCommunity, ShajingStreet,Bao'anDistrict,Shenzhen,Guangdong,China TestResult : PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. Page 3 of31 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01 Contents 1TESTSTANDARDS...................................................................................................................4 2SUMMARY......................................................................................................................................5 2.1GeneralRemarks5 2.2ProductDescription5 2.3EquipmentUnderTest5 2.4ShortdescriptionoftheEquipmentunderTest(EUT)5 2.5EUToperationmode6 2.6BlockDiagramofTestSetup6 2.7RelatedSubmittal(s)/Grant(s)6 2.8Modifications6 3TESTENVIRONMENT.............................................................................................................7 3.1Addressofthetestlaboratory7 3.2TestFacility7 3.3Environmentalconditions7 3.4Summaryofmeasurementresults8 3.5Statementofthemeasurementuncertainty8 3.6EquipmentsUsedduringtheTest9 4TESTCONDITIONSANDRESULTS............................................................................11 4.1ACPowerConductedEmission11 4.2RadiatedEmissionsandBandEdge14 4.3MaximumPeakOutputPower21 4.4PowerSpectralDensity22 4.56dBBandwidth24 4.6Out-of-bandEmissions26 4.7AntennaRequirement29 5TESTSETUPPHOTOSOFTHEEUT..........................................................................30 6PHOTOSOFTHEEUT.........................................................................................................31 Page 4 of31 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01 1TESTSTANDARDS Thetestswereperformedaccordingtofollowingstandards: FCCRulesPart15.247:FrequencyHopping,DirectSpreadSpectrumandHybridSystemsthatarein operationwithinthebandsof902-928MHz,2400-2483.5MHz,and5725-5850MHz. ANSIC63.10-2020:AmericanNationalStandardforTestingUnlicensedWirelessDevices KDB558074D01V05r02:GuidanceforPerformingComplianceMeasurementsonDigitalTransmission Systems(DTS)OperatingUnder§15.247 Page 5 of31 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01 2SUMMARY 2.1GeneralRemarks Dateofreceiptoftestsample:November26,2025 Testingcommencedon:November26,2025 Testingconcludedon: December5,2025 2.2ProductDescription ProductDescription:smartwatch Model/Typereference:YK16 Powersupply:DC3.85VFromBatteryorDC5VbyUSBport HardwareVersion:/ SoftwareVersion:/ Adapterinformation (Auxiliarytestsuppliedby testingLab） Model:EP-TA20CBC Input:AC100-240V50/60Hz Output:DC5V2A FirmwareVersion:EPTA5.14.2 Manufacture:HuizhouDongyangYienbiElectronicsCo.,Ltd TestingsampleID： MAX25110148P01-R01-1#(Engineersample), MAX25110148P01-R01-2#(Normalsample) BluetoothBLE Supportedtype:BluetoothlowEnergy Modulation:GFSK Operationfrequency: 2402MHzto2480MHz Channelnumber:40 Channelseparation: 2MHz Antennatype: MetalAntenna Antennagain:-1.87dBi 2.3EquipmentUnderTest Powersupplysystemutilised Powersupplyvoltage: ○ 230V/50Hz ○ 120V/60Hz ○ 12VDC ○ 24VDC ● Other(specifiedinblankbelow) DC3.85Vfrombattery 2.4ShortdescriptionoftheEquipmentunderTest(EUT) Thisisasmartwatch. Formoredetails,refertotheuser’smanualoftheEUT. Page 6 of31 MAXLABTestingCo.,Ltd.ReportNo.:MAX25110148P01-R01 2.5EUToperationmode TheApplicantprovidescommunicationtoolssoftware(Engineermode)tocontroltheEUTforstayingin continuoustransmitting(DutyCyclemorethan98%)andreceivingmodefortesting.Thereare40channels providedtotheEUTandChannel00/19/39wereselectedtotest. OperationF…

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FCCID：2BBXJ-YK16 FCCID：2BBXJ-YK16