2BNFB-RW402Rowing Machine

XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD. Address ： Factorybuilding,3/F,No.133,TongjiNorthRoad,Tong'anDistrict,Xiamen,Fujian, China Date:2026-06-17 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Ref:AttestationStatementsPart2.911(d)(7)Filing SUBJECT:FCCApplicationforFCCID:2BNFB-RW402 FRN:0036508877 (“XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD.”)certifiesthat,asofthedateofthe filingoftheapplication,CELLTINC.isourdesignatedU.S.agentforserviceofprocessfor theabovereferencedFCCID.(“XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD.”) acceptstomaintainanagentfornolessthanoneyearafterthegranteehasterminatedall marketingandimportationortheconclusionofanyCommission-relatedproceedinginvolving theequipment. CELLTINC.accepts,asofthedateofthefilingoftheapplication,theobligationofthe designatedU.S.agentforserviceofprocessfortheabovereferencedFCCID. DesignatedU.S.AgentInformation: Name:CELLTINC. Address:140121STST#12958SACRAMENTO,CA95811UnitedStates FRN：0036412567 ContactPerson:ThompsonLim Tel.:(424)347-4188 Email:[email protected] Sincerely, SignedonbehalfofXIAMENDERBY HEALTHTECHNOLOGYCO.,LTD. SignedonbehalfofCELLTINC. Name:QiulinWangName:ThompsonLim Title:ManagerTitle:GeneralManager Date:2026-06-17Date:2026-06-17

Rev1/26/2023 XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:06-17-2026 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2BNFB-RW402 (“XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD.”)certifiesthattheequipmentforwhichauthorization issoughtisnot“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuantto section2.903oftheFCCrules. (“XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD.”)certifiesthattheequipmentforwhichauthorization issoughtdoesnotincludecybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab, Inc.oranyofitssuccessorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc.(or anyofitssuccessorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB 986446D01CoveredEquipmentGuidancesectionB(2a). Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, (Applicantsignature)QiulinWang (Applicantprintedname) Rev1/26/2023 XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:06-01-2026 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2BNFB-RW402 (“XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD.”)certifiesthat,asofthedateofthefilingofthe application,XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD.isnotidentifiedontheCoveredList(asa specificallynamedentityoranyofitssubsidiariesoraffiliates)asanentityproducing“covered” equipment. Sincerely, (Applicantsignature) (Applicantprintedname)QiulinWang

XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD. Date ： 06-17-2026 Product/ModelNumber:RowingMachine/RW402 Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatQAILaboratoriesLtd.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyQAILaboratoriesLtd.onour behalfshallhavethesameeffectasactsofourown. By:QiulinWang ContactListedonFCCWesbite Title:Manager Email:[email protected] Telephone:+86-13459002786 Onbehalfof:XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD.

XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD. OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:June17,2026 Subject;RequestforConfidentiality FCCID:2BNFB-RW402 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:QiulinWang Title:Manager

Label: RowingMachine Model:RW402 FCCID:2BNFB-RW402 35mm 20mm

FCCID:2BNFB-RW402 RFExposureEvaluation AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1093 ， UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone 1-gheadorbodyand10-gextremitySARevaluationforgeneralpopulationexposure conditions,bymeasurementornumericalsimulation,isnotrequiredwhenthe correspondingSARTestExclusionThresholdcondition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤5mm,the1-gand10-gSARtest exclusionthresholdsaredeterminedbythefollowing: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance, mm)]·[√f (GHz) ]≤3.0for1-gSAR,and≤7.5for10-gextremitySAR,where f (GHz) istheRFchanneltransmitfrequencyinGHz PoweranddistanceareroundedtothenearestmWandmmbeforecalculation Theresultisroundedtoonedecimalplaceforcomparison Here, SoaSARtestisnotrequired Mode Freque ncy (MHz) Max Power (dBm) Targetpower W/tolerance (dBm) Maxtune uppower tolerance (dBm) MaxPower (mW) Min. Distance (mm) Calc. thresholds limit GFSK 2402 0.14 0±111.2595.000.3903.0 2440 -0.35 0±111.2595.000.3933.0 2480 -1.34 -1±1 01.0005.000.3153.0

TPB01-C1antenna Small Size 2.4 GHz PCB antenna 1 INTRODUCTION and considerations for complying with regulatory limits when using this design. The suggested antenna design requires no m ore than 11 x 2.5 mm of space and ensures a VSWR r atio of less than 2 across the 2.4 GHz ISM band when connected to a 50 oh m source. The PCB antenna used on the TPB01-C1 r eference design is described in this application note. Even if the antenna pr esented is for a TPB01-C1 it can be used in all 2.4 GHz designs, especially where small space is required for the antenna. This application note describes the antenna dimensions, the RF performance Figure 1 : TPB01-C1 XIAMEN DERBY HEALTH TECHNOLOGY CO., LTD. Factory building, 3/F, No. 133, Tongji North Road, Tong 'an District, Xiamen, Fujian, China ANTENNA DESIGN The PCB antenna on the TPB01-C1 reference design is a meande「ed Inverted F Antenna (IFA). The IFA was designed to match an impedance of 50 ohm at 2.45 GHz. Thus no additional matching components are necessary. 2 Design Goals The reflection at the feed point of the antenna determines how much of the applied power is d elivered to the antenna. A reflection of less than -10 dB across the 2.4 GHz ISM band, when connected to a 50 ohm source, was a design goal. Reflection of less than斗O dB, or VSWR less than 2, ensures that more than 90% of the available power is delivered to the antenna. B andwidth is in this document defined as the f「equency band where mo「e than 90% of the available power is delivered to the antenna. Another design goal was to fit the size of the PCB antenna on a TPB01-C1 and to obtain good pe时ormance also when the dongle is connected to a comp uter. 2.1 Simulation IE3D from Zeland, which is an electromagnetic simulation tool, was used to design the antenna. The accuracy of the simulation is controlled by the mesh. An increase of the mesh increases the simulation time. Thus, for initial simulations mesh = 1 should be used. When a fairly good result is achieved a higher mesh should be used to obtain more accurate results. Comparison of simulation and measurement results shows that the measured reflection is between the result obtained with mesh = 5 and mesh = 1 ; see Figure 2 for details. 2.2 -3 - 12 也 飞， - 21 -2 7 - 1 5 · 1 8 - 9 ...• Simulated mesh6 -Simulated mesh1 一 ···· ·＆T o －－， ．．．． ，，，， ．．．．．．．． 01· …－ Measured free s p ,oe 3 , ·24 · 。 -3 “ 6 - 9 - 1 2 国 飞， · 1 5 - 1 8 -2 7 - 21 -30 3 28 2 7 24 25 26 Froqu•ncy (GHz) 23 22 2. - 30 2 Figure 2: C。mparisonof Simulation and Measurements Results 2.3 Layout and Implementation Small changes o f the antenna dimensions may have large impact on the performance. Therefore it is strongly recommended to make an exact copy of the reference design to achieve optimum pe斤。rmance. The easiest way to implement the antenna is to import the gerber or DXF file showing the antenna layout. The imported file can be used as a template when drawing the antenna. By using this procedure it should be possible to make an exact copy. If the PCB CAD tool being used does not suppo叫impo时of DXF or gerber files, Figu「e 3 and Table 1 should be used to ensure correct implementation. It is recommended to gene「ate a gerber file for compa「isοn with IFA_USB.spl when making a manual implementation. Most g erber viewers have the possibility to impo同several gerbe「 files at the same time. Thus by placing the gerber file, showing the manually implemented antenna, on top of IFA_USB.spl it is easy to ve「ify that the antenna is correctly implemented. It is also recommended to use the same thickness and type of PCB material as used in the reference design. Information about the PCB can be found in a separate readme file included in the reference design. To compensate for a thicker/thinner PCB the antenna could be made slightly shorter/longer. . W1 W2 Figure 3: Antenna Dimensions Unit:mm 3 TEST RESULTS Reflection, radiation pattern and variation of output power across a wide frequency band were mea sured to verify the pe斤ormance of the PCB antenna. Measurements of the dongle in f「ee space and when connected to a la ptop were performed to verify that the antenna is suitable both f o「 T PB01-C1 d esigns and in a standalone ap plication. Free space is in this document i nterpreted a s a measurement pe斤。rmed without connecting the dongle to a computer. In such a measurement the dongle is only powered by a b attery. 3 .1 Reflecti。n All the 「eflectionmeasurements were performed with a network analyzer connected to a semi-rigid coax cable, which was soldered to the feed point of the antenna. Because of the small size antenna and the small ground plane this kind of measurements is heavily affected by the presence and placement of the coax cable. This influence can「esult in a small uncertainty in resonance frequency and measured 「eflection.Typically different placement of the semi-rigid coax cable could change the resonance frequency with 5 -10 MHz and the reflection with 3 - 4 dB. Free space - 2 -4 叫 6 叫 B - 1 0 - 12 百 －14 - 1 6 - 1 8 - 2 0 ·22 I ” ·24 I· ·26 I 甲 - 2 8 2.1 T ．」－－－－ ’ I 2.2 啥－ 一－叫 τ T l 2.3 With。ut test pins 丁’””－ r 」－－ , With plastic I " ’ I τ ． ι I I " I －－－－－←－－ － － 一咆－ －一一一一一一 千 ＋ 一 ← ”’ ’1 ， τ 2.4 2 5 2.6 2. 7 2.8 Frequency (GHz) ' .,. .,. 丁 J」 " －一一一 叫卜 T T l 2.9 。 - 2 -4 而 - 8 - 1 0 ·12 回 - 1 4 百 - 1 6 - 1 8 - 2 0 - 2 2 -2 4 - 2 6 - 2 8 3 Figu『-e 4: Influence of Plastic Encapsulation and Test Pins A small pa门on the TPB01-C1 PCB is equipped with test pins. These are intended for use during development. This pa时of the PCB will typically be omitted in a final application. The red and green graph on Figure 4 shows that removing this pa同of the PCB has a small impact on the pe 斤ormance. Figure 4 also shows that plastic encapsulation of the dongle will shift the resonance f requency to a lower frequency. This can be compensated by making the antenna slightly shorter. The size of the g「ound plane affects the pe付ormance of t he PCB antenna. Connecting the TPB01-C1 to a computer…

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Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page1of23 RF Test Data Duty Cycle........................................................................................................................................................................2 Maximum Peak Conducted Output Power.......................................................................................................................5 -6dB Bandwidth................................................................................................................................................................8 Occupied Channel Bandwidth........................................................................................................................................11 Maximum Power Spectral Density Level....................................................................................................................... 14 Band Edge......................................................................................................................................................................17 Conducted RF Spurious Emission.................................................................................................................................20 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page2of23 Duty Cycle ConditionModeFrequency(MHz)AntennaDutyCycle(%)CorrectionFactor(dB)1/T(kHz) NVNT BLE 1M2402Ant114.168.4911.3 NVNT BLE 1M2440Ant114.168.4911.3 NVNT BLE 1M2480Ant114.158.4911.3 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page3of23 Duty Cycle NVNT BLE 1M 2402MHz Ant1 Duty Cycle NVNT BLE 1M 2440MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page4of23 Duty Cycle NVNT BLE 1M 2480MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page5of23 Maximum Peak Conducted Output Power Conditio n Mod e Frequenc y(MHz) Antenn a Conducte dPower (dBm) Total Conducte dPower (dBm) Total Conducte dPower (W) Limit Conducted(dB m) Verdic t NVNT BLE 1M 2402Ant10.140.140.0010330Pass NVNT BLE 1M 2440Ant1-0.35-0.350.0009230Pass NVNT BLE 1M 2480Ant1-1.34-1.340.0007330Pass Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page6of23 Peak Power NVNT BLE 1M 2402MHz Ant1 Peak Power NVNT BLE 1M 2440MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page7of23 Peak Power NVNT BLE 1M 2480MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page8of23 -6dB Bandwidth ConditionModeFrequency (MHz) Antenna-6dBBandwidth (MHz) Limit-6dBBandwidth (MHz) Verdict NVNTBLE 1M 2402Ant10.51790.5Pass NVNTBLE 1M 2440Ant10.52360.5Pass NVNTBLE 1M 2480Ant10.5340.5Pass Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page9of23 -6dB Bandwidth NVNT BLE 1M 2402MHz Ant1 -6dB Bandwidth NVNT BLE 1M 2440MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page10of23 -6dB Bandwidth NVNT BLE 1M 2480MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page11of23 Occupied Channel Bandwidth ConditionModeFrequency(MHz)Antenna99%OBW(MHz) NVNTBLE 1M2402Ant11.1983 NVNTBLE 1M2440Ant11.257 NVNTBLE 1M2480Ant11.2554 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page12of23 OBW NVNT BLE 1M 2402MHz Ant1 OBW NVNT BLE 1M 2440MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page13of23 OBW NVNT BLE 1M 2480MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page14of23 Maximum Power Spectral Density Level ConditionModeFrequency (MHz) Antenn a ConductedPSD (dBm/3kHz) Limit (dBm/3kHz) Verdic t NVNTBLE 1M2402Ant1-20.138Pass NVNTBLE 1M2440Ant1-20.828Pass NVNTBLE 1M2480Ant1-22.038Pass Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page15of23 PSD NVNT BLE 1M 2402MHz Ant1 PSD NVNT BLE 1M 2440MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page16of23 PSD NVNT BLE 1M 2480MHz Ant1 Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page17of23 Band Edge ConditionModeFrequency(MHz)AntennaMaxValue(dBc)Limit(dBc)Verdict NVNTBLE 1M2402Ant1-50.34-20Pass NVNTBLE 1M2480Ant1-54.29-20Pass Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page18of23 Band Edge NVNT BLE 1M 2402MHz Ant1 Ref Band Edge NVNT BLE 1M 2402MHz Ant1 Emission Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page19of23 Band Edge NVNT BLE 1M 2480MHz Ant1 Ref Band Edge NVNT BLE 1M 2480MHz Ant1 Emission Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page20of23 Conducted RF Spurious Emission ConditionModeFrequency(MHz)AntennaMaxValue(dBc)Limit(dBc)Verdict NVNTBLE 1M2402Ant1-43.27-20Pass NVNTBLE 1M2440Ant1-42.29-20Pass NVNTBLE 1M2480Ant1-40.01-20Pass Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page21of23 Tx. Spurious NVNT BLE 1M 2402MHz Ant1 Ref Tx. Spurious NVNT BLE 1M 2402MHz Ant1 Emission Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page22of23 Tx. Spurious NVNT BLE 1M 2440MHz Ant1 Ref Tx. Spurious NVNT BLE 1M 2440MHz Ant1 Emission Report No.:SZNTT26020615E1-1 SZNTT-TR728-0Page23of23 Tx. Spurious NVNT BLE 1M 2480MHz Ant1 Ref Tx. Spurious NVNT BLE 1M 2480MHz Ant1 Emission

ShenzhenNTTTestingTechnologyCo.,Ltd.ReportNo.:SZNTT26020615E1-1 SZNTT-TR828-0Tel:0755-27889935Web:http://www.ntt-testing.comPage1of27 TESTREPORT Applicant:XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD. Address: Factorybuilding,3/F,No.133,TongjiNorthRoad,Tong'anDistrict, Xiamen,Fujian,China Manufacturer:XIAMENDERBYHEALTHTECHNOLOGYCO.,LTD. Address: Factorybuilding,3/F,No.133,TongjiNorthRoad,Tong'anDistrict, Xiamen,Fujian,China ProductName:RowingMachine ModelNumber:RW402 Trademark:N/A FCCID:2BNFB-RW402 TestDate: May11,2026–May29,2026 DateofReport: May29,2026 TestResult: ThisdevicedescribedabovehasbeentestedbyNTT,andthetest resultsshowthattheequipmentundertest(EUT)isincompliance withtheStandardrequirements.Anditisapplicableonlytothetested sampleidentifiedinthereport. TestProcedureUsed: Standards:FCCCFRTitle47Part15SubpartCSection15.247 ANSIC63.10-2020+Cor.1-2023 KDB558074D0115.247MeasGuidancev05r02April2,2019 Preparedby(TestEngineer): CindyQin Approved(Manager): KenWu Approved(Manager): AbelYu ShenzhenNTTTestingTechnologyCo.,Ltd.ReportNo.:SZNTT26020615E1-1 SZNTT-TR828-0Tel:0755-27889935Web:http://www.ntt-testing.comPage2of27 TABLEOFCONTENT 1.GeneralInformation......................................................................................4 1.1.DescriptionofDevice(EUT).......................................................................................................................4 1.2.ChannelList..................................................................................................................................................4 1.3.Summaryoftestresult................................................................................................................................5 1.4.SpecialAccessoriesandAuxiliaryEquipment........................................................................................5 1.5.Testmode......................................................................................................................................................5 1.6.Testconfiguration.........................................................................................................................................5 1.7.BlockDiagram...............................................................................................................................................6 1.8.TestConditions.............................................................................................................................................6 1.9.MeasurementUncertainty(95%confidencelevels,k=2)......................................................................6 1.10.TestFacility..................................................................................................................................................7 1.11.TestEquipment...........................................................................................................................................8 2.Conductedemissionatthemainsterminalstest....................................10 2.1.Limit..............................................................................................................................................................10 2.2.TestSetup....................................................................................................................................................10 2.3.TestProcedure............................................................................................................................................10 2.4.TestResult...................................................................................................................................................11 3.RadiatedSpuriousEmissions...................................................................12 3.1.Limit..............................................................................................................................................................12 3.2.TestSetup....................................................................................................................................................13 3.3.TestProcedure............................................................................................................................................14 3.4.TestResult...................................................................................................................................................15 4.ConductedSpuriousEmissions................................................................20 4.1.Limit..............................................................................................................................................................20 4.2.TestSetup....................................................................................................................................................20 4.3.TestProcedure............................................................................................................................................20 4.4.TestResult...................................................................................................................................................21 5.BandEdgeMeasurement...........................................................................22 5.1.Limit..............................................................................................................................................................22 5.2.Testsetup....................................................................................................................................................22 5.3.TestProcedure............................................................................................................................................22 5.4.TestResult...................................................................................................................................................22 6.-6dBBandwidthand99%BandwidthMeasurement.............…

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