2BNCN-HF1HF1 Intelligent multifunctional formaldehyde monitor

ReferenceNo. 2024U0434 1/1 US AGENTLETTEROF ATTESTATION US Agent: CompanyName:CELLTINC. Address:24404S VERMONTAVE STE 307C,HARBORCITY,CA 90710,USA FRN：0036412567 ContactPerson:ThompsonLim Tel.: 001-424-3474188 Email:[email protected] TO: Officeof EngineeringTechnology FederalCommunicationsCommission 7435 OaklandMills Road Columbia,MD 21046 This letter is to confirmthat we have acceptedthe responsibilityto act as US agent representativeon behalfof the ( ShenzhenATuManPrecisionMachineryTechnologyCo., Ltd.) notedbelowfor all futureFCC certification/registrationsobtainedduringthe periodof this agreement,whichends at the specifieddate below. As per US agent,we are awareof the requirementsinvolvedas outlinedin FCC Equipment AuthorizationProgramin their Reportand OrderFCC 22-84and the clause§ 2.911Application requirements. Ap plicant Companyname: ShenzhenATuManPrecisionMachineryTechnologyCo., Ltd. Granteecode:2BNCN FCC ID:2BNCN-HF1 ContactName:YONGLIANGLU Address: 2415 BaoshanTimesBuilding,MinqiangCommunity,MinzhiStreet,Longhua District,Shenzhen TelephoneNo: +86 18675582602 Email:[email protected] The Applicantacknowledgethe acceptanceof its obligationto maintainan agentfor serviceof processin the UnitedStatesfor no less than one year after eitherthe granteehas permanentlyterminatedall marketingand importationof the applicable equipmentwithinthe U.S.,or the conclusionof any Commission-related administrativeor judicialproceedinginvolvingthe equipment,whicheveris later. Date: 2025-1-9 Applicant’s Name:YONGLIANGLUUS Agent ’s Name:ThompsonLim Title: ManagerTitle: Manager SignatureSignature FRN: 0036497220

(ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd.) (2025.01.13) EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 RE:AttestationStatementsPart2.911(d)(5)(i)requestfor(FCCID:2BNCN-HF1) [ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd.](“theapplicant”) certifiesthattheequipmentforwhichauthorizationissoughtisnot“covered” equipmentprohibitedfromreceivinganequipmentauthorizationpursuanttosection 2.903oftheFCCrules. Sincerely, (Applicantsignature) (Applicantprintedname)YONGLIANGLU (ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd.) (2025.01.13) EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 RE:AttestationStatementsPart2.911(d)(5)(ii)requestfor(FCCID:2BNCN-HF1) [ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd.](“theapplicant”) certifiesthat,asofthedateofthefilingoftheapplication,theapplicantisnotidentified ontheCoveredListasanentityproducing“covered”equipment. Sincerely, (Applicantsignature) (Applicantprintedname)YONGLIANGLU

ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd. AgentAuthorizationLetter 2025-01-13 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:YONGLIANGLU Position:Manager CompanyName:ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd. Address:2415BaoshanTimesBuilding,MinqiangCommunity,Minzhi Street,LonghuaDistrictShenzhenChina Tel/Fax+86-18676682602/N/A E-Mail:[email protected]

ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd. LongTermConfidentialityRequestLetter 2025-01-13 EurofinsElectricalandElectronicTestingNA,Inc. 914WestPatapscoAvenue Baltimore,MD21230 USA RE:CONFIDENTIALITYREQUESTFOR(FCCID:2BNCN-HF1) ToWhomItMayConcern: Thisletterservesasanofficialrequestforconfidentialityundersections0.457and0.459of CFR47.Wehaverequestedthatthe -e.g.Blockdiagram -e.g.SCH -e.g.OperationalDescription requiredtobesubmittedwiththisapplicationbepermanentlywithheldfrompublicreview. Theabovedocumentsarecompanyproprietaryinformationthatcouldnevergetinto thepossessionofyourcompetition. Pleasecontactmeifthereisanyinformationyoumayneed. Sincerely, Name:YONGLIANGLU Position:Manager CompanyName:ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd. Address:2415BaoshanTimesBuilding,MinqiangCommunity,Minzhi Street,LonghuaDistrictShenzhenChina Tel/Fax+86-18676682602/N/A E-Mail:[email protected]

ModelNo.:HF1 FRONTVIEWOFSAMPLE BACKVIEWOFSAMPLE ModelNo.:HF1 LEFTVIEWOFSAMPLE RIGHTVIEWOFSAMPLE ModelNo.:HF1 TOPVIEWOFSAMPLE BOTTOMVIEWOFSAMPLE

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ModelNo.:HF1 Page1of5 INTERNALPHOTOOFSAMPLE INTERNALPHOTOOFSAMPLEPCB ModelNo.:HF1 Page2of5 INTERNALPHOTOOFSAMPLEPCB INTERNALPHOTOOFSAMPLEPCB ModelNo.:HF1 Page3of5 INTERNALPHOTOOFSAMPLEPCB INTERNALPHOTOOFSAMPLEPCB ModelNo.:HF1 Page4of5 INTERNALPHOTOOFSAMPLEPCB BTantenna ModelNo.:HF1 Page5of5 BATTERYPHOTOOFSAMPLE

ShenzhenMostTechnologyServiceCo.,Ltd. No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark,Nanshan, Shenzhen,Guangdong,China. RFExposureEvaluationReport ReportReferenceNo........................: FCCID.................................................: MTEB25010061-H 2BNCN-HF1 Compiledby (position+printedname+signature) .. :FileadministratorsAlisaLuo Supervisedby (position+printedname+signature)..:TestEngineerSunnyDeng Approvedby (position+printedname+signature)..: ManagerYvetteZhou Dateofissue.........................................:Jan.08,2025 RepresentativeLaboratoryName.:ShenzhenMostTechnologyServiceCo.,Ltd. Address.................................................: No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark, Nanshan,Shenzhen,Guangdong,China. Applicant’sname ............................... :ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd. Address.................................................: 2415BaoshanTimesBuilding,MinqiangCommunity,MinzhiStreet, LonghuaDistrict,Shenzhen Testspecification/Standard ............ : 47CFRPart1.1307 47CFRPart2.1093 TRFOriginator......................................:ShenzhenMostTechnologyServiceCo.,Ltd. ShenzhenMostTechnologyServiceCo.,Ltd.Allrightsreserved. Thispublicationmaybereproducedinwholeorinpartfornon-commercialpurposesaslongasthe ShenzhenMostTechnologyServiceCo.,Ltd.isacknowledgedascopyrightownerandsourceofthe material.ShenzhenMostTechnologyServiceCo.,Ltd.takesnoresponsibilityforandwillnotassume liabilityfordamagesresultingfromthereader'sinterpretationofthereproducedmaterialduetoits placementandcontext. Testitemdescription........................: HF1Intelligentmultifunctionalformaldehydemonitor TradeMark ............................................ : ATuMan、DUKA、杜克 Model/Typereference ......................... : HF1 ListedModels ...................................... :N/A ModulationType..................................: GFSK OperationFrequency..........................: From2402MHzto2480MHz HardwareVersion ................................. V1.020241123 SoftwareVersion ................................... V2.1.1_0005 Rating.....................................................: DC5V/1A DC3.7VbyBattery Result ..................................................... : PASS ReportNo.:MTEB25010061-HPage 2 of 5 TESTREPORT EquipmentunderTest:HF1Intelligentmultifunctionalformaldehydemonitor Model/Type:HF1 ListedModels:N/A RemarkN/A Applicant:ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd. Address: 2415BaoshanTimesBuilding,MinqiangCommunity,Minzhi Street,LonghuaDistrict,Shenzhen Manufacturer:HenanATuManPrecisionMachineryTechnologyCo.,Ltd. Address : BuildingD,standardworkshop,southeastcorner,intersectionof XingyeAvenueandRuheAvenue,YichengDistrict,Zhumadian City,HenanProvince,China TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:MTEB25010061-HPage 3 of 5 1.RevisionHistory RevisionIssueDateRevisionsRevisedBy 00 2025.01.08 InitialIssueAlisaLuo ReportNo.:MTEB25010061-HPage 4 of 5 2.SAREvaluation 2.1RFExposureComplianceRequirement 2.1.1StandardRequirement AccordingtoKDB447498D01GeneralRFExposureGuidancev06 4.3.1.StandaloneSARtestexclusionconsiderations UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone1-gheadorbodyand 10-gextremitySARevaluationforgeneralpopulationexposureconditions,bymeasurementornumerical simulation,isnotrequiredwhenthecorrespondingSARExclusionThresholdcondition,listedbelow,is satisfied. 2.1.2Limits The1-gand10-gSARtestexclusionthresholdsfor100MHzto6GHzattestseparationdistances≤50mm aredeterminedby: [(max.powerofchannel,includingtune-uptolerance,mW)/(min.testseparationdistance,mm)]·[√f(GHz)] ≤3.0for1-gSARand≤7.5for10-gextremitySAR,where Thetestexclusionsareapplicableonlywhentheminimumtestseparationdistanceis≤50mmand fortransmissionfrequenciesbetween100MHzand6GHz.Whentheminimumtestseparation distanceis<5mm,adistanceof5mmisappliedtodetermineSARtestexclusion ReportNo.:MTEB25010061-HPage 5 of 5 2.1.3EUTRFExposure MeasurementData BLE GFSK Testchannel PeakOutputPower (dBm) Tuneuptolerance (dBm) Maximumtune-upPower (dBm) Lowest(2402MHz)2.1612.161±13.161 Middle(2440MHz)1.0971.097±12.097 Highest(2480MHz)0.0290.029±11.029 Worstcase:GFSK Channel MaximumPeak ConductedOutput Power (dBm) Maximumtune-up Power Calculated value Exclusion threshold SARTest Exclusion (dBm)(mW) Lowest(2402MHz)2.1613.1612.070.643.0Yes .......................THEENDOFREPORT.........................

Antenna SPEC. Antenna Model：HF1 Manufacturer：Shenzhen ATuMan Precision Machinery Technology Co., Ltd. 2415 Baoshan Times Building, Minqiang Community, Minzhi Street, Longhua District, Shenzhen Antenna size Antenna efficiency： Passive Test For 2.4G FreqEffiEffiGainGainUHISDHISMaxMinAttenutAttenut (MHz)(%)(dB)(dBi)(dBd)(%)(%)(dB)(dB)HorVer 240035.63-4.480.58-1.5718.11117.5160.58-13.4452.0452.1 241035.09-4.550.54-1.6117.83317.2610.54-14.3252.4652.46 242038.23-4.180.92-1.2319.42918.7960.92-14.6352.0852.29 243030.16-5.21-0.02-2.1715.3714.787-0.02-15.6850.3250.23 244042.58-3.711.58-0.5721.6420.941.58-14.0251.4551.43 245030.98-5.090.36-1.7915.60515.3790.36-15.7850.2350.3 246035.38-4.511.12-1.0317.67117.7121.12-15.3351.4251.44 247024.98-6.02-0.21-2.3612.27512.703-0.21-17.9751.0851 248031.92-4.960.9-1.2515.5416.3840.9-17.8251.4251.44 249022.83-6.41-0.43-2.5810.92511.91-0.43-21.0651.0650.78 250032.31-4.911.06-1.0915.30117.0081.06-20.4851.5251.43 ANT 2.4-2.5GHz Antenna pattern ANT 2.4-2.5GHz Antenna pattern

ShenzhenMostTechnologyServiceCo.,Ltd. No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark,Nanshan, Shenzhen,Guangdong,China. TESTREPORT FCCRulesPart15.247 ReportReferenceNo........................: FCCID................................................: MTEB25010061-R1 2BNCN-HF1 Compiledby (position+printedname+signature)..:FileadministratorsAlisaLuo Supervisedby (position+printedname+signature)..:TestEngineerSunnyDeng Approvedby (position+printedname+signature)..: ManagerYvetteZhou Dateofissue.........................................:Jan.08,2025 RepresentativeLaboratoryName.:ShenzhenMostTechnologyServiceCo.,Ltd. Address ................................................. : No.5,2ndLangshanRoad,NorthDistrict,Hi-techIndustrialPark, Nanshan,Shenzhen,Guangdong,China. Applicant’sname...............................:ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd. Address.................................................: 2415BaoshanTimesBuilding,MinqiangCommunity,MinzhiStreet, 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........................: HF1Intelligentmultifunctionalformaldehydemonitor TradeMark...........................: ATuMan、DUKA、杜克 Model/Typereference.........................: HF1 ListedModels ..................................... :N/A ModulationType .................................. :GFSK OperationFrequency..........................:From2402MHzto2480MHz HardwareVersion.................................V1.020241123 SoftwareVersion...................................V2.1.1_0005 Rating.....................................................: DC5V/1A DC3.7VbyBattery Result ..................................................... :PASS ReportNo.:MTEB25010061-R1Page 2 of 38 TESTREPORT EquipmentunderTest:HF1Intelligentmultifunctionalformaldehydemonitor Model/Type:HF1 ListedModels:N/A RemarkN/A Applicant:ShenzhenATuManPrecisionMachineryTechnologyCo.,Ltd. Address: 2415BaoshanTimesBuilding,MinqiangCommunity,Minzhi Street,LonghuaDistrict,Shenzhen Manufacturer:HenanATuManPrecisionMachineryTechnologyCo.,Ltd. Address : BuildingD,standardworkshop,southeastcorner,intersectionof XingyeAvenueandRuheAvenue,YichengDistrict,Zhumadian City,HenanProvince,China TestResult:PASS Thetestreportmerelycorrespondstothetestsample. Itisnotpermittedtocopyextractsofthesetestresultwithoutthewrittenpermissionofthetest laboratory. ReportNo.:MTEB25010061-R1Page 3 of 38 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...........................................................................................................11 5.TESTCONDITIONSANDRESULTS.......................................................................…

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ModelNo.:HF1 CETESTSETUP RETESTSETUP ModelNo.:HF1 RETESTSETUP