2BT2P-USZX390CWalking Pad(Treadmill)

USZX390C USZX390C

ShenzhenYaoshunNetworkTechnologyCo.,Ltd 2026-01-26 EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 RE:AttestationStatementsPart2.911(d)(5)(i)requestfor(FCCID:2BT2P-USZX390C) [ShenzhenYaoshunNetworkTechnologyCo.,Ltd]certifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Wealsocertifythat,asofthedateofthefilingoftheapplication,theequipmentdoes notutilizecyber-securityoranti-virussoftwarefromKasperskyLab,Inc,oranyofits successorsandassignees,whichisalsoonthe“coveredlist”. Sincerely, xiaoxiang ShenzhenYaoshunNetworkTechnologyCo.,Ltd 2026-01-26 EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 RE:AttestationStatementsPart2.911(d)(5)(ii)requestfor(FCCID:2BT2P-USZX390C) [ShenzhenYaoshunNetworkTechnologyCo.,Ltd]certifiesthat,asofthedateofthe filingoftheapplication,theapplicantisnotidentifiedontheCoveredListasanentity producing“covered”equipment. Sincerely, xiaoxiang

ShenzhenYaoshunNetworkTechnologyCo.,Ltd AgentAuthorizationLetter 2026-01-28 EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 USA RE:LETTEROFAGENTAUTHORIZATION ToWhomItMayConcern: We,theundersigned,herebyauthorizeShenzhenMostTechnologyServiceCo.,Ltd.toact onourbehalfinallmattersrelatingtoapplicationforequipmentauthorization,includingthe signingofalldocumentsrelatingtothesematters. Wealsoherebycertifythatnopartytotheapplicationauthorizedhereunderissubjecttothe denialofbenefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuse Actof1988,21U.S.C.853(a). Thisagreementexpiresoneyearfromthecurrentdate. Sincerely, Name:xiaoxiang Position:Manger CompanyName:ShenzhenYaoshunNetworkTechnologyCo.,Ltd Address:Room3023rdFloor,BuildingA,Gainiankongjian,No.85JianhuiRoad, Yucuicom-munity.LonghuaStreet,LonghuaDistrict,Shenzhen Tel/Fax18718051463 E-Mail:[email protected]

ShenzhenYaoshunNetworkTechnologyCo.,Ltd LongTermConfidentialityRequestLetter 2026-01-28 EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 USA RE:CONFIDENTIALITYREQUESTFOR(FCCID:2BT2P-USZX390C) ToWhomItMayConcern: Thisletterservesasanofficialrequestforconfidentialityundersections0.457and0.459of CFR47.Wehaverequestedthatthe -e.g.Blockdiagram -e.g.SCH -e.g.OperationalDescription requiredtobesubmittedwiththisapplicationbepermanentlywithheldfrompublicreview. Theabovedocumentsarecompanyproprietaryinformationthatcouldnevergetinto thepossessionofyourcompetition. Pleasecontactmeifthereisanyinformationyoumayneed. Sincerely, Name:xiaoxiang Position:Manger CompanyName:ShenzhenYaoshunNetworkTechnologyCo.,Ltd Address:Room3023rdFloor,BuildingA,Gainiankongjian,No.85JianhuiRoad, Yucuicom-munity.LonghuaStreet,LonghuaDistrict,Shenzhen Tel/Fax18718051463 E-Mail:[email protected]

ShenzhenYaoshunNetworkTechnologyCo.,Ltd Modeldifferenceletter 2026-01-26 OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA ThisisanewApplicationfromShenzhenYaoshunNetworkTechnologyCo.,Ltd ModelNo.:USZX390C,USZX390B,USZX390E,CAZX390B OnlythemodelUSZX390Cwastested,Theirelectricalcircuitdesign,layout, componentsusedandinternalwiringareidentical,Onlythemodelnamesand AppearanceColorisdifferentisdifferent. Thankyouforyourcooperation! Yourssincerely, Signatory: Sincerely, Signature: Name:xiaoxiang Title:Manger

Model No.: USZX390C FRONT VIEW OF SAMPLE BACK VIEW OF SAMPLE Model No.: USZX390C LEFT VIEW OF SAMPLE RIGHT VIEW OF SAMPLE Model No.: USZX390C TOP VIEW OF SAMPLE BOTTOM VIEW OF SAMPLE Model No.: USZX390C

Model No.: USZX390C Page 1 of 5 INTERNAL PHOTO OF SAMPLE INTERNAL PHOTO OF SAMPLE PCB Model No.: USZX390C Page 2 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Model No.: USZX390C Page 3 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB BT ANT Location Model No.: USZX390C Page 4 of 5 INTERNAL PHOTO OF SAMPLE PCB INTERNAL PHOTO OF SAMPLE PCB Model No.: USZX390C Page 5 of 5 INTERNAL PHOTO OF SAMPLE PCB

ShenzhenMostTechnologyServiceCo.,Ltd. EastA,1floorofNewAolinFactorybuiding,LangshanErlu,NorthDistrict, Hi-techIndustryPark,Nanshan,Shenzhen,Guangdong,China RFExposureEvaluationReport ReportReferenceNo. ....................... : FCCID.. ............................................... : MTEB26010068-H 2BT2P-USZX390C Compiledby (position+printedname+signature)..:FileadministratorsAlisaLuo Supervisedby (position+printedname+signature)..:TestEngineerSunnyDeng Approvedby (position+printedname+signature) .. : ManagerYvetteZhou Dateofissue ......................................... :Jan.09,2026 RepresentativeLaboratoryName . :ShenzhenMostTechnologyServiceCo.,Ltd. Address.................................................: No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark, Nanshan,Shenzhen,Guangdong,China. Applicant’sname ............................... :ShenzhenYaoshunNetworkTechnologyCo.,Ltd Address.................................................: Room3023rdFloor,BuildingA,Gainiankongjian,No.85Jianhui Road,Yucuicommunity,LonghuaStreet,LonghuaDistrict, Shenzhen Testspecification/Standard............: 47CFRPart1.1307;47CFRPart1.1310 KDB447498D01GeneralRFExposureGuidancev06 TRFOriginator......................................:ShenzhenMostTechnologyServiceCo.,Ltd. ShenzhenMostTechnologyServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenMostTechnologyServiceCo.,Ltd.isacknowledgedascopyrightownerandsourceofthe material.ShenzhenMostTechnologyServiceCo.,Ltd.takesnoresponsibilityforandwillnotassume liabilityfordamagesresultingfromthereader'sinterpretationofthereproducedmaterialduetoits placementandcontext. Testitemdescription........................: WalkingPad(Treadmill) TradeMark ............................................ : N/A Model/Typereference ......................... : USZX390C ListedModels ...................................... : USZX390B,USZX390E,CAZX390B ModulationType .................................. : GFSK,π/4DQPSK,8DPSK OperationFrequency..........................: From2402MHzto2480MHz HardwareVersion................................. 1.0 SoftwareVersion................................... 1.4.0 Rating ..................................................... : AC100-120V,50-60Hz,800W Result ..................................................... :PASS ReportNo.:MTEB26010068-HPage 2 of 6 TESTREPORT EquipmentunderTest:WalkingPad(Treadmill) Model/Type:USZX390C ListedModels:USZX390B,USZX390E,CAZX390B Remark Onlythemodel“USZX390C”wastested,Theirelectricalcircuit design,layout,componentsusedandinternalwiringareidentical, OnlythemodelnameandAppearancecolourisdifferent. Applicant:ShenzhenYaoshunNetworkTechnologyCo.,Ltd Address: Room3023rdFloor,BuildingA,Gainiankongjian,No.85Jianhui Road,Yucuicommunity,LonghuaStreet,LonghuaDistrict, Shenzhen Manufacturer:ZhejiangYoubuSportsGoodsJointStockCo.,Ltd. Address : No.9LiunanRoad,NiubeijinIndustrialZone,WuyiCounty,Jinhua City,ZhejiangProvince,China TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:MTEB26010068-HPage 3 of 6 1.RevisionHistory RevisionIssueDateRevisionsRevisedBy 002026.01.09InitialIssueAlisaLuo ReportNo.:MTEB26010068-HPage 4 of 6 2.SAREvaluation 2.1RFExposureComplianceRequirement 2.1.1StandardRequirement AccordingtoKDB447498D01GeneralRFExposureGuidancev06 4.3.1.StandaloneSARtestexclusionconsiderations UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone1-gheador bodyand10-gextremitySARevaluationforgeneralpopulationexposureconditions,bymeasurementor numericalsimulation,isnotrequiredwhenthecorrespondingSARExclusionThresholdcondition,listed below,issatisfied. 2.1.2Limits AccordingtoFCCPart1.1310:Thecriterialistedinthefollowingtableshallbeusedtoevaluatethe environmentimpactofhumanexposuretoradiofrequency(RF)radiationasspecifiedinpart1.1307(b) F=FrequencyinMHz FriisFormula Friistransmissionformula:Pd=(Pout*G)/(4*Pi*R2)Where Pd=powerdensityinmW/cm2 Pout=outputpowertoantennainmW G=gainofantennainlinearscale Pi=3.1416 R=distancebetweenobservationpointandcenteroftheradiatorincm PdidthelimitofMPE,1mW/cm2.Ifweknowthemaximumgainoftheantennaandthetotalpower inputtotheantenna,throughthecalculation,wewillknowthedistancerwheretheMPElimitisreached. ReportNo.:MTEB26010068-HPage 5 of 6 2.1.3EUTRFExposure BLE GFSK Testchannel PeakOutputPower (dBm) Tuneuptolerance (dBm) Maximumtune-upPower (dBm) Lowest(2402MHz)1.111.11±12.11 Middle(2440MHz)0.820.82±11.82 Highest(2480MHz)0.510.51±11.51 BLE Worstcase:GFSK Channel Maximum tune-up Power (dBm) Maximumtune-up Power (MW) AntennaGain (dBi) Power Density atR=20 cm (mW/cm2) LimitResult Lowest(2402MHz)2.111.63-0.470.000281.0Pass Note:1)RefertoreportMTEB26010068-R1forEUTtestMaxConductedaverageOutputPowervalue. Note:2)Pd=(Pout*G)/(4*Pi*R2)=(1.63*0.9)/(4*3.1416*20 2 )=0.00028 BTclassic GFSK Testchannel PeakOutputPower (dBm) Tuneuptolerance (dBm) Maximumtune-upPower (dBm) Lowest(2402MHz)-0.29-0.29±10.71 Middle(2441MHz)-0.63-0.63±10.37 Highest(2480MHz)-0.94-0.94±10.06 π/4DQPSK Testchannel PeakOutputPower (dBm) Tuneuptolerance (dBm) Maximumtune-upPower (dBm) Lowest(2402MHz)0.670.67±11.67 Middle(2441MHz)0.360.36±11.36 Highest(2480MHz)-0.05-0.05±10.95 ReportNo.:MTEB26010068-HPage 6 of 6 8DPSK Testchannel PeakOutputPower (dBm) Tuneuptolerance (dBm) Maximumtune-upPower (dBm) Lowest(2402MHz)0.700.70±11.7 Middle(2441MHz)0.420.42±11.42 Highest(2480MHz)0.060.06±11.06 Worstcase:8DPSK Channel Maximum tune-upPower (dBm) Maximumtune-up Power (MW) AntennaGain(dBi) Power Density atR=20 cm (mW/cm2) LimitResult Lowest(2402MHz)1.71.48-0.470.000261.0Pass Note:1)RefertoreportMTEB26010068-RforEUTtestMaxConductedaverageOutputPowervalue. Note:2)Pd=(Pout*G)/(4*Pi*R2)=(1.48*0.9)/(4*3.1416*202)=0.00026 Note:3)EUT'sBluetoothmoduleismorethan20cmawayfromthehumanbody. .......................THEENDOFREPORT.........................

Antenna Describe 1.Antenna Describe: 2. External View Drawing: Picture of Antenna Antenna PlateIFA Antenna Gain -0.47dBi Frequency Range2402 - 2480 MHz Connector TypePCB Model Name FS-BT-C1 Company NameFitShow (Xiamen) Information Technology Co., Ltd 3.Test Data Frequency2.4GHz 2.41GHz 2.42GHz 2.43GHz 2.44GHz 2.45GHz 2.46GHz 2.47GHz 2.48GHz 2.485GHz Horizontal () H Peak EIRP (dBi)-0.47-1.23-2.1-2.23-2.18-2.17-1.96-2.5-3.35-4.05 H Directivity (dBi)4.454.284.083.893.873.974.124.234.234.18 H Efficiency (dB)-4.92-5.51-6.18-6.12-6.05-6.14-6.08-6.73-7.58-8.23 H Efficiency (%)32.2128.1224.124.4324.8324.3224.6621.2317.4615.03 H Gain (dBi)-0.47-1.23-2.1-2.23-2.18-2.17-1.96-2.5-3.35-4.05 Maximum H Value (dBi)-0.47-1.23-2.1-2.23-2.18-2.17-1.96-2.5-3.35-4.05 Minimum H Value (dBi)-32.5-38.32 -39.99 -45.96 -42.99 -39.14 -36.62 -33.55 -32.89 -34.78 Vertical () V Peak EIRP (dBi)-7.95-8.31-9.05-9.17-8.59-8.09-7.56-7.73-8.09-8.6 V Directivity (dBi)5.075.25.024.754.955.155.165.175.295.33 V Efficiency (dB)-13.02 -13.51 -14.07 -13.92 -13.54 -13.24 -12.72-12.9-13.38 -13.93 V Efficiency (%)4.994.463.924.064.434.745.355.134.594.05 V Gain (dBi)-7.95-8.31-9.05-9.17-8.59-8.09-7.56-7.73-8.09-8.6 Maximum V Value (dBi)-7.95-8.31-9.05-9.17-8.59-8.09-7.56-7.73-8.09-8.6 Minimum V Value (dBi) -42.86 -40.86 -37.04 -41.11 -44.37 -38.86-44.8-44.22 -39.58 -39.93 4 、Test Pattern 2.4GHzUp View2.4GHzDown View2.4GHzFront View 2.45GHzUp View 2.45GHzDow n View 2.45GHzFro nt View 2.485GHzUp View 2.485GHzDo wn View 2.485GHzFr ont View 2.4GHz@Theta 0.0 Horizontal 2.4GHz@Theta 0.0 Vertical 2.4GHz@Theta 0.0 Total 2.45GHz@Theta 0.0 Horizontal 2.45GHz@Theta 0.0 Vertical 2.45GHz@Theta 0.0 Total 2.485GHz@Theta 0.0 Horizontal 2.485GHz@Theta 0.0 Vertical 2.485GHz@Theta 0.0 Total 2.4GHz@Theta 0.0 Horizontal 2.4GHz@Theta 0.0 Vertical 2.4GHz@Theta 0.0 Total 2.45GHz@Theta 0.0 Horizontal 2.45GHz@Theta 0.0 Vertical 2.45GHz@Theta 0.0 Total 2.485GHz@Theta 0.0 Horizontal 2.485GHz@Theta 0.0 Vertical 2.485GHz@Theta 0.0 Total

ShenzhenMostTechnologyServiceCo.,Ltd. No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark,Nanshan, Shenzhen,Guangdong,China. TESTREPORT FCCRulesPart15.247 ReportReferenceNo........................: FCCID................................................: MTEB26010068-R1 2BT2P-USZX390C Compiledby (position+printedname+signature)..:FileadministratorsAlisaLuo Supervisedby (position+printedname+signature)..:TestEngineerSunnyDeng Approvedby (position+printedname+signature)..: ManagerYvetteZhou Dateofissue.........................................:Jan.09,2026 RepresentativeLaboratoryName.:ShenzhenMostTechnologyServiceCo.,Ltd. Address ................................................. : EastA,1/F.,NewAolinFactoryBuiding,LangshanErlu,North Area,Hi-TechIndustrialPark,NanshanDistrict,Shenzhen, Guangdong,China Applicant’sname...............................:ShenzhenYaoshunNetworkTechnologyCo.,Ltd Address ................................................. : Room3023rdFloor,BuildingA,Gainiankongjian,No.85Jianhui Road,Yucuicommunity,LonghuaStreet,LonghuaDistrict, Shenzhen Testspecification/Standard ............ : FCCRulesPart15.247 TRFOriginator......................................:ShenzhenMostTechnologyServiceCo.,Ltd. ShenzhenMostTechnologyServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenMostTechnologyServiceCo.,Ltd.isacknowledgedascopyrightownerandsourceofthe material.ShenzhenMostTechnologyServiceCo.,Ltd.takesnoresponsibilityforandwillnotassume liabilityfordamagesresultingfromthereader'sinterpretationofthereproducedmaterialduetoits placementandcontext. Testitemdescription ........................ : WalkingPad(Treadmill) TradeMark...........................: N/A Model/Typereference ......................... : USZX390C ListedModels.....................................: USZX390B,USZX390E,CAZX390B ModulationType..................................:GFSK OperationFrequency..........................:From2402MHzto2480MHz HardwareVersion................................. 1.0 SoftwareVersion ................................... 1.4.0 Rating ..................................................... : AC100-120V,50-60Hz,800W Result.....................................................:PASS ReportNo.:MTEB26010068-R1Page 2 of 40 TESTREPORT EquipmentunderTest:WalkingPad(Treadmill) Model/Type:USZX390C ListedModels:USZX390B,USZX390E,CAZX390B Remark Onlythemodel“USZX390C”wastested,Theirelectricalcircuit design,layout,componentsusedandinternalwiringareidentical, OnlythemodelnameandAppearancecolourisdifferent. Applicant: ShenzhenYaoshunNetworkTechnologyCo.,Ltd Address: Room3023rdFloor,BuildingA,Gainiankongjian,No.85Jianhui Road,Yucuicommunity,LonghuaStreet,LonghuaDistrict, Shenzhen Manufacturer:ZhejiangYoubuSportsGoodsJointStockCo.,Ltd. Address :No.9LiunanRoad,NiubeijinIndustrialZone,WuyiCounty,Jinhua City,ZhejiangProvince,China TestResult : PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:MTEB26010068-R1Page 3 of 40 Contents 1.REVISIONHISTORY.........................................................................................................................4 2.TESTSTANDARDS............................................................................................................................5 3.SUMMARY...............................................................................................................................................6 3.1.GeneralRemarks.........................................................................................................................................6 3.2.ProductDescription....................................................................................................................................6 3.3.EquipmentUnderTest................................................................................................................................6 3.4.ShortdescriptionoftheEquipmentunderTest(EUT)............................................................................6 3.5.EUToperationmode....................................................................................................................................7 3.6.BlockDiagramofTestSetup......................................................................................................................7 3.7.TestItem(EquipmentUnderTest)Description*.......................................................................................7 3.8.AuxiliaryEquipment(AE)Description.......................................................................................................7 3.9.AntennaInformation*..................................................................................................................................8 3.10.EUTconfiguration......................................................................................................................................8 3.11.Modifications..............................................................................................................................................8 4.TESTENVIRONMENT.......................................................................................................................9 4.1.Addressofthetestlaboratory...................................................................................................................9 4.2.Environmentalconditions...........................................................................................................................9 4.3.TestDescription.........................................................................................................................................10 4.4.Statementofthemeasurementuncertainty...........................................................................................10 4.5.EquipmentsUsedduringtheTest........................................…

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Model No.: USZX390C CE TEST SETUP RE TEST SETUP Model No.: USZX390C RE TEST SETUP