2BEFV-S424 Channels Smart Relay Switch

S42 4 CHANNELS SMART RELAY SWITCH USER MANUAL-EN .ylsuoenatlumis stupni CD dna CA tcennoc TON oD :GNINRAW ⚠ DC input (5~24V) Product display Nc Com NoNc Com NoNc Com NoNc Com No Parameters: Model: S42 SPC: <0.5W Input: AC 100-240V ~ or DC 5-24V (Do not use both concurrently) Switching Current Per Channel: <10A(NO), <7A(NC) Wireless: WiFi 2.4Ghz 802.11 b/g/n+Bluetooth Product Size: 3.46 × 2.52 × 0.98 in Wiring Port of Load Equipment； There are 4 groups in total. AC input (100~240V) Indicator On/Off Switch Reset All on All off 1 [NC] -- Normally Closed Terminal [COM] -- Common Terminal [NO] -- Normally Open Terminal Wiring Method ① （AC 100~240V） Nc Com NoNc Com NoNc Com NoNc Com No LN N L （AC 100~240V） （AC 100~240V） In this case, the light bulb is a normally open type of load device. Therefore, we select the COM and NO ports for wiring. Switch On: The lights on Switch Off: The lights off Please pay attention to the identification of the wiring ports. Incorrect wiring may damage the equipment. 2 Wiring Method ②（DC 5~24V） Nc Com NoNc Com NoNc Com NoNc Com No + - - + （DC 5~24V） In this case, the solenoid valve is a normally closed type of load device. Therefore, we select the COM and NC ports for wiring. （DC 5~24V） Switch On: The valves open, water flows through. Switch Off: The valves close, the water flow is cut off. 3 When the voltage is 5V, please use shorter and thicker wires. Wiring Method ③（Independent power supply） Nc Com NoNc Com NoNc Com NoNc Com No N L DC 5~24V AC 100~240V In this case, the power supply of the device is independent of that of the load. + - 4 Connect to the APP Step1: Get the Tuya Smart or Smart Life APP from the App Store or Google Play Store, or scan below QR code, then register and log in. Step2: Put device into Pairing Mode(Reset the device). Long press any button for 7 seconds. The indicator flashes to indicate networking start. Reset1234 Press and hold any button (Reset,1,2,3,4) for 7 seconds. The indicator flashes to indicate networking start. 5 Connect to the APP Step3: Tap "+" button on App to add device. On the "Add device" page, The device icon will appear automatically. (If it does not appear, go back to the previous step and reset the device.) Simply click the device icon to add the device. Or scan this product QR code to add it. 6 Precautions Regarding Networking: > The device only supports 2.4Ghz Wi-Fi for networking and does not support 5Ghz Wi-Fi. > Ensure that the location where the device is placed has sufficient Wi-Fi signal coverage. > Ensure smartphone Bluetooth is enabled and within 3 meters of the device Others: > When using the device, do not exceed its maximum power. > Operating temperature: -10°C to 40°C (14°F to 104°F) at 5%-95% RH non-condensing > When wiring, pay attention to the instructions for the wiring terminals and avoid incorrect connections to prevent damaging the device. > Please place the device in a safe location, away from children and humid environments. 7 After-sales Service For product network configuration, APP usage, etc., you can visit the official service website of Tuya for inquiry: https://support.tuya.com/en/help FCC Caution: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- Reorient or relocate the receiving antenna. -- Increase the separation between the equipment and receiver. -- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -- Consult the dealer or an experienced radio/TV technician for help. To maintain compliance with FCCs RF Exposure guidelines, This equipment should be installed and operated with minimum distance between 20cm the radiator your body: Use only the supplied antenna.

ReportNo.:CISRR26052726001 Page 43 of 46 9.EXTERNALANDINTERNALPHOTOS 9.1.ExternalPhotos ReportNo.:CISRR26052726001 Page 44 of 46

Label Size:60mm*30mm 4 Channels Smart Relay Switch Model No.:S42 FCC ID:2BEFV-S42 Label Location

ReportNo.:CISRR26052726001 Page 45 of 46 9.2.InternalPhotos ReportNo.:CISRR26052726001 Page 46 of 46 ------Endofthereport-----

ReportNo.:CISRR26052726003 Reporttemplateversion:CISE-TR-001-A0Page:1of6 TESTREPORT RFExposureEvaluation ReportNo.CISRR26052726003 ProjectNo.CISR260527260 FCCID2BEFV-S42 ApplicantDongguanShuseTechnologyCo.,Ltd Address No.606,No.3XiaobianStreet,Chang'anTown,DongguanCity, GuangdongProvince,China ManufacturerDongguanShuseTechnologyCo.,Ltd Address No.606,No.3XiaobianStreet,Chang'anTown,DongguanCity, GuangdongProvince,China ProductName4ChannelsSmartRelaySwitch Trademark- Model/TypereferenceS42 ListedModel(s)S43,S44,S45,S46 Standard 47CFRPart2.1091 DateofsamplereceiptMay27,2026 TestdateMay27,2026toJune03,2026 IssuedateJune04,2026 TestresultComplied Reviewedby:GenryLong Approvedby:HansHu Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangceTesting TechnologyCo.,Ltd. ReportNo.:CISRR26052726003 Reporttemplateversion:CISE-TR-001-A0Page:2of6 1.APPLICABLESTANDARD 47CFRPart2.1091:Radiofrequencyradiationexposureevaluation:mobiledevices ANSIC95.1–3999:IEEEStandardforSafetyLevelswithRespecttoHumanExposuretoRadioFrequency ElectromagneticFields,3kHzto300GHz. FCCKDBpublication447498D01GeneralRFExposureGuidancev06:MobileandPortableDevicesRF ExposureProceduresandEquipmentAuthorizationPolicies. 47CFRPart1.1307:Actionsthatmayhaveasignificantenvironmentaleffect,forwhichEnvironmental Assessments(EAs)mustbeprepared. 47CFRPart1.1310:Radiofrequencyradiationexposurelimits. 2.REPORTVERSION VersionNo.IssuedateDescription 00June04,2026Original ReportNo.:CISRR26052726003 Reporttemplateversion:CISE-TR-001-A0Page:3of6 3.RADIOSPECIFICATIONDESCRIPTION WIFI-2.4GHzBand Supportedtype:802.11b802.11g802.11n 802.11ax Bluetooth Supportedtype:BREDRLE-1Mbps LE-2Mbps Note:PleaserefertoRFreportfordetailedtechnicalspecifications 4.SIMULTANEOUSTRANSMISSIONANALYSIS ThesedevicesuseasingletransmittermoduleandantennaforWLANorBLE. ReportNo.:CISRR26052726003 Reporttemplateversion:CISE-TR-001-A0Page:4of6 5.TESTRESULT 5.1.SARtestexclusionEvaluation ExclusionLimit: KDB447498D01v06,Clause4.3.1b) 100MHzto1500MHz {[Powerallowedatnumericthresholdfor50mminstepa)]+[(testseparation distance–50mm)·(f(MHz)/150)]}mW 1500MHzand≤6GHz {[Powerallowedatnumericthresholdfor50mminstepa)]+[(testseparation distance–50mm)·10]}mW Result: Passed TestData Radiotype Frequency (GHz) Maximum output power #1 (dBm) Antenna gain #2 (dBi) Maximum EIRP #3 (dBm) Maximum tune-upEIRP (dBm) Minimum distance #4 (mm) Exclusion Limit (dBm) Result 2.4GWIFI2.4126.972.219.1810200mm32.03PASS BLE2402-0.212.212.003200mm32.03PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. #3:EIRP=Maximumoutputpower+Antennagain. #4:Thisvalueisdeclaredbytheapplicant. ReportNo.:CISRR26052726003 Reporttemplateversion:CISE-TR-001-A0Page:5of6 5.2.Standalonetransmission Limit: Thecriterialistedinthefollowingtableshallbeusedtoevaluatetheenvironment impactofhumanexposuretoradiofrequency(RF)radiationasspecifiedin1.1307(b) LimitsforMaximumPermissibleExposure(MPE) Frequency range(MHz) Electricfield strength(V/m) Magneticfield strength (A/m) Powerdensity (mW/cm 2 ) Averaging time(minutes) (A)LimitsforOccupational/ControlledExposures 0.3–3.06141.63*(100)6 3.0–301842/f4.89/f *(900/f 2 ) 6 30–30061.40.1631.06 300–1500--f/3006 1500–100,000--56 (B)LimitsforGeneralPopulation/UncontrolledExposure 0.3–1.346141.63*(100)30 1.34–30824/f2.19/f *(180/f 2 ) 30 30–30027.50.0730.230 300–1500--f/150030 1500–100,000--1.030 Evaluationmethod: Pd=(Pout*G)/(4*pi*r 2 ) Where Pd=powerdensityinmW/cm 2 ,Pout=outputpowertoantennainmW, G=gainofantennainlinearscale,Pi=3.1416, R=distancebetweenobservationpointandcenteroftheradiatorincm Result:Passed TestData Radiotype Maximum outputpower (dBm) #1 Maximum tune-uppower (dBm) Antenna gain(dBi) #2 Minimun distance(cm) #3 Pd (mW/cm 2 ) Limit (mW/cm 2 ) Result 2.4GWIFI7.96102.21200.004161.0PASS BLE-0.2132.21200.00071.0PASS Note #1:ThisvaluecomesfromtheRFtestreport. #2:Thisvalueisdeclaredbytheapplicant. ReportNo.:CISRR26052726003 Reporttemplateversion:CISE-TR-001-A0Page:6of6 5.3.Simultaneoustransmission Limit: KDB447498D01v06,Clause4.3.2,47CFRPart1.1307 InthecaseofxedRFsourcesoperatinginthesametime-averagingperiod,orof multiplemobileorportableRFsourceswithinadeviceoperatinginthesametime averagingperiod,ifthesumofthefractionalcontributionstotheapplicablethresholds islessthanorequalto1asindicatedinthefollowingequation. Where a=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(B)ofthissectionforP,includingexistingexempttransmittersandthosebeing added. b=numberoffxed,mobile,orportableRFsourcesclaimingexemptionusingparagraph (b)(3)(i)(C)ofthissectionforThresholdERP,includingexistingexempttransmittersand thosebeingadded. c=numberofexistingfixed,mobile,orportableRFsourceswithknownevaluationforthespeci edminimumdistanceincludingexistingevaluatedtransmitters. P j =theavailablemaximumtime-averagedpowerortheERP,whicheverisgreater,forxed, mobile,orportableRFsourceiatadistancebetween0.5cmand40cm(inclusive). P th,j =theexemptionthresholdpower(P)accordingtoparagraph(b)(3)(i)(B)ofthissectionfor xed,mobile,orportableRFsourcei. ERP j =theERPoffixed,mobile,orportableRFsourcej. ERP th,j =exemptionthresholdERPforfixed,mobile,orportableRFsourcej,atadistanceofat leastλ/2πaccordingtotheapplicableformulaofparagraph(b)(3)(i)(C)ofthissection. Evaluated k =themaximumreportedSARorMPEoffixed,mobile,orportableRFsourcekeither inthedeviceoratthetransmittersitefromanexistingevaluationatthelocationofexposure. ExposureLimit k =eitherthegeneralpopulation/uncontrolledmaximumpermissibleexposure (MPE)orspecicabsorptionrate(SAR)limitforeachxed,mobile,orportableRFsourcek, asapplicablefrom§1.1310ofthischapter. Result:NotApplicable --------EndofReport--------

ReportNo.:CISRR26052726001 Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. Page1of39 TESTREPORT ReportNo.CISRR26052726001 ProjectNo.CISR260527260 FCCID2BEFV-S42 ApplicantDongguanShuseTechnologyCo.,Ltd Address No.606,No.3XiaobianStreet,Chang'anTown,DongguanCity, GuangdongProvince,China ManufacturerDongguanShuseTechnologyCo.,Ltd Address No.606,No.3XiaobianStreet,Chang'anTown,DongguanCity, GuangdongProvince,China ProductName4ChannelsSmartRelaySwitch Trademark- Model/TypereferenceS42 ListedModel(s)S43,S44,S45,S46 Standard 47CFRPart15.247 DateofsamplereceiptMay27,2026 TestdateMay27,2026toJune03,2026 IssuedateJune04,2026 TestresultComplied Reviewedby:GenryLong Approvedby:HansHu ReportNo.:CISRR26052726001 Page 2 of 39 Contents 1.STANDARDANDAPPLICABLETESTMETHODS........................................................................................3 2.REPORTVERSION..........................................................................................................................................3 3.TESTDESCRIPTION.......................................................................................................................................4 4.SUMMARY........................................................................................................................................................5 4.1.ProductDescription*..................................................................................................................................5 4.2.RadioSpecificationDescription*..............................................................................................................5 4.3.ModificationofEUT.....................................................................................................................................6 4.4.Deviationfromstandards...........................................................................................................................6 4.5.TestingSite...................................................................................................................................................6 5.TESTCONFIGURATION.................................................................................................................................7 5.1.Testfrequencylist.......................................................................................................................................7 5.2.Descriptionsoftestmode...........................................................................................................................7 5.3.Testsampleinformation.............................................................................................................................7 5.4.Environmentalconditions...........................................................................................................................7 5.5.Statementofthemeasurementuncertainty.............................................................................................7 5.6.EquipmentUsedduringtheTest................................................................................................................8 6.TESTRESULTS.............................................................................................................................................10 6.1.EvaluationResults(Evaluation)...............................................................................................................10 6.1.1.AntennaRequirement............................................................................................................................10 6.2.RadioSpectrumMatterTestResults(RF)...............................................................................................11 6.2.1.ConductedEmissionatACpowerline.................................................................................................11 6.2.2.6dBBandwidth........................................................................................................................................14 6.2.3.MaximumConductedOutputPower.....................................................................................................15 6.2.4.PowerSpectralDensity..........................................................................................................................16 6.2.5.Conductedbandedgeandspuriousemission...................................................................................17 6.2.6.Radiatedbandedgeemission...............................................................................................................18 6.2.7.RadiatedSpuriousEmission(below1GHz).........................................................................................23 6.2.8.RadiatedSpuriousEmission(Above1GHz)........................................................................................27 7.APPENDIXREPORT......................................................................................................................................34 7.1.ConductedOutputPower.........................................................................................................................34 7.2.6dBBandwidth...........................................................................................................................................35 7.3.PowerSpectralDensity.............................................................................................................................36 7.4.DutyCycle..................................................................................................................................................37 7.5.ConductedSpurious&BandEdgeEmission.........................................................................................38 ReportNo.:CISRR26052726001 Page 3 of 39 1.STANDARDANDAPPLICABLETESTMETHODS Thetestswereperformedaccordingtofollowingstandards: 47CFRPart15…

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ReportNo.:CISRR26052726002 Thetestresultsrelateonlytothetestedsamples. ThetestreportshouldnotbereproducedexceptinfullwithoutthewrittenapprovalofShenzhenBangce TestingTechnologyCo.,Ltd. Page1of50 TESTREPORT ReportNo.CISRR26052726002 ProjectNo.CISR260527260 FCCID2BEFV-S42 ApplicantDongguanShuseTechnologyCo.,Ltd Address No.606,No.3XiaobianStreet,Chang'anTown,DongguanCity, GuangdongProvince,China ManufacturerDongguanShuseTechnologyCo.,Ltd Address No.606,No.3XiaobianStreet,Chang'anTown,DongguanCity, GuangdongProvince,China ProductName4ChannelsSmartRelaySwitch Trademark- Model/TypereferenceS42 ListedModel(s)S43,S44,S45,S46 Standard 47CFRPart15.247 DateofsamplereceiptMay27,2026 TestdateMay27,2026toJune03,2026 IssuedateJune04,2026 TestresultComplied Reviewedby:GenryLong Approvedby:HansHu ReportNo.:CISRR26052726002 Page 2 of 50 Contents 1.STANDARDANDAPPLICABLETESTMETHODS........................................................................................3 2.REPORTVERSION..........................................................................................................................................3 3.TESTDESCRIPTION.......................................................................................................................................4 4.SUMMARY........................................................................................................................................................5 4.1.ProductDescription*..................................................................................................................................5 4.2.RadioSpecificationDescription*..............................................................................................................5 4.3.ModificationofEUT.....................................................................................................................................5 4.4.Deviationfromstandards...........................................................................................................................6 4.5.TestingSite...................................................................................................................................................6 5.TESTCONFIGURATION.................................................................................................................................7 5.1.Testfrequencylist.......................................................................................................................................7 5.2.Descriptionsoftestmode...........................................................................................................................7 5.3.Testsampleinformation.............................................................................................................................7 5.4.Environmentalconditions...........................................................................................................................7 5.5.Statementofthemeasurementuncertainty.............................................................................................7 5.6.EquipmentUsedduringtheTest................................................................................................................8 6.TESTRESULTS.............................................................................................................................................10 6.1.EvaluationResults(Evaluation)...............................................................................................................10 6.1.1.AntennaRequirement............................................................................................................................10 6.2.RadioSpectrumMatterTestResults(RF)...............................................................................................11 6.2.1.ConductedEmissionatACpowerline.................................................................................................11 6.2.2.6dBBandwidth........................................................................................................................................14 6.2.3.MaximumConductedOutputPower.....................................................................................................15 6.2.4.PowerSpectralDensity..........................................................................................................................16 6.2.5.Conductedbandedgeandspuriousemission...................................................................................17 6.2.6.Radiatedbandedgeemission...............................................................................................................18 6.2.7.RadiatedSpuriousEmission(below1GHz).........................................................................................23 6.2.8.RadiatedSpuriousEmission(Above1GHz)........................................................................................26 7.APPENDIXREPORT......................................................................................................................................33 7.1.ConductedPeakOutputPower................................................................................................................33 7.2.PowerSpectralDensity.............................................................................................................................36 7.3.6dBBandwidth...........................................................................................................................................39 7.4.DutyCycle..................................................................................................................................................42 7.5.ConductedSpurious&BandEdgeEmission.........................................................................................45 ReportNo.:CISRR26052726002 Page 3 of 50 1.STANDARDANDAPPLICABLETESTMETHODS Thetestswereperformedaccordingtofollowingstandards: 47CFRPart15.247:…

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AntennaSpecification Manufacture：TUYA ProductName：CBUAntenna AntennaType：PCB TestDate：2020.11.24 Testedby：YinhuaZhang Approvedby：Licco Content 1.GeneralDescription.................................................................................1 2.TestConfigurations...................................................................................2 2.1TestEnvironment............................................................................2 2.2TestEquipment...............................................................................2 2.3TestPrinciple...................................................................................2 3.TestResults..............................................................................................3 3.1GainandEfficiency..........................................................................3 3.2RadiationPattern............................................................................4 4.AntennaDimensions................................................................................5 5.EUTPhoto................................................................................................5 6.TestSetupPhoto......................................................................................6 1 1.GeneralDescription ManufacturerHangzhouTuyaInformationTechnologyCo.,Ltd Address Room701,Building3,MoreCenter,No.87GuDunRoad, Hangzhou,Zhejiang,China TestLocation Room106,Building3,LetongSciencePark,No.500, QiuyiRoad,BinjiangDistrict,Hangzhou ProductNameCBUAntenna Productmodel CBU AntennaType PCBAntenna TestItems Gain;Efficiency;RadiationPattern TestFrequency 2400-2500MHz TestStandard ANSI/IEEEStd149-1979 2 2.TestConfigurations 2.1TestEnvironment Temperature(°C)25 Humidity(%RH)60 AtmosphericPressure(kPa)100.5 2.2TestEquipment TestSystemTEM24Multi-probeMicrowaveChamber TestInstrumentAgilentE5071B 2.3TestPrinciple 3 3.TestResults 3.1GainandEfficiency Frequency(MHz)PeakGain(dBi)Efficiency(%) 2400 2.1132.36 2410 2.1832.3 2420 2.2132.1 2430 2.0632.4 2440 2.0732.9 2450 1.9130.9 2460 2.0430.8 2470 2.0930.7 2480 1.9831.6 2490 1.9130.6 2500 1.0330.5 4 3.2RadiationPattern Phi02D Phi902D Theta902D 5 2440MHz3D 4.AntennaDimensions 5.EUTPhoto 6 6.TestSetupPhoto

ReportNo.:CISRR26052726001 Page 41 of 46 8.TESTSETUPPHOTOS ConductedEmissionatACpowerline Radiatedbandedgeemission RadiatedSpuriousEmission(Above1GHz) ReportNo.:CISRR26052726001 Page 42 of 46 RadiatedSpuriousEmission(below1GHz)