2BX49-DP8000Diesel Heater

YUHAIDIDATECHNOLOGYLIMITED Address：Rm701,Unit108B,7/F,TwrBNewMandarinPlaza,14Science MuseumRd ， TsimShaTsui ， HongKong FRN:0038857447 Date:2026-09-11 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Ref:AttestationStatementsPart2.911(d)(7)Filing SUBJECT:FCCApplicationforFCCID:2BX49-DP8000 YUHAIDIDATECHNOLOGYLIMITEDcertifiesthat,asofthedateofthefilingofthe application,XINNAISIINCisourdesignatedU.S.agentforserviceofprocessfortheabove referencedFCCID.YUHAIDIDATECHNOLOGYLIMITEDacceptstomaintainanagentfor nolessthanoneyearafterthegranteehasterminatedallmarketingandimportationorthe conclusionofanyCommission-relatedproceedinginvolvingtheequipment. XINNAISIINCaccepts,asofthedateofthefilingoftheapplication,theobligationofthe designatedU.S.agentforserviceofprocessfortheabovereferencedFCCID. DesignatedU.S.AgentInformation: Name:XINNAISIINC Address:1500NGRANTSTSTER,DENVER,CO80203 FRN:0037518289 ContactPerson:KiKi Tel.:+01(951)893-3011 Email:[email protected] Sincerely, Signedonbehalfof YUHAIDIDATECHNOLOGYLIMITED SignedonbehalfofXINNAISIINC XIAOLU KiKi Name:Name: Title:ManagerTitle:Manager Date:2026-09-11Date:2026-09-11

Rev9/15/2025 YUHAIDIDATECHNOLOGYLIMITED FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:Sep.07,2026 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2BX49-DP8000 YUHAIDIDATECHNOLOGYLIMITED.certifiesthattheequipmentforwhichauthorizationissoughtis not“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuanttosection 2.903oftheFCCrules. YUHAIDIDATECHNOLOGYLIMITED.certifiesthattheequipmentforwhichauthorizationissoughtdoes notincludecybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab,Inc.oranyofits successorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyofits successorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446 D01CoveredEquipmentGuidancesectionB(2a). █Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, XIAOLU FAIRLANDGROUPLIMITED. Rev9/15/2025 FAIRLANDGROUPLIMITED. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:Sep.07,2026 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2BX49-DP8000 YUHAIDIDATECHNOLOGYLIMITED.certifiesthat,asofthedateofthefilingoftheapplication,the applicantisnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofitssubsidiariesor affiliates)asanentityproducing“covered”equipment. Sincerely, XIAOLU FAIRLANDGROUPLIMITED.

YUHAIDIDATECHNOLOGYLIMITED Date：Sep.07,2026 ProductModelNumber:DP8000,DP9000,DP8500,DP8000,DP5000,DP7000, DP2000,DP8000V2,DP8000V3,DP8000V4,DP5000V2,DP5000V3,DP9000V2, DP8500V2,DP001,DP002 FCCID：2BX49-DP8000 Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatQAILaboratoriesLtd.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyQAILaboratoriesLtd.onour behalfshallhavethesameeffectasactsofourown. By: ContactListedonFCCWesbite Title:XIAOLU Email:[email protected] Telephone:18122050760 Onbehalfof:YUHAIDIDATECHNOLOGYLIMITED

YUHAIDIDATECHNOLOGYLIMITED OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:September7,2026 Subject;RequestforConfidentiality FCCID:2BX49-DP8000 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:XIAOLU Title:Manager

version01 YUHAIDIDATECHNOLOGYLIMITED Modeldifferencestatement Itisherebydeclaredthattheproduct FCCID:2BX49-DP8000 ProductName:DieselHeater Model(s):DP8000,DP9000,DP8500,DP8000,DP5000,DP7000,DP2000,DP8000V2, DP8000V3,DP8000V4,DP5000V2,DP5000V3,DP9000V2, DP8500V2,DP001,DP002 Theabove-mentionedproductssharethesamecircuitry,PCBlayout,electricalcomponents,materials, circuitstructureanddecorativeaccessories'materials,buttheydifferincolor. Signature Name:XIAOLU Title:Manager ApplicantCompany:YUHAIDIDATECHNOLOGYLIMITED

Externalphotos ShenzhenATATestingLab.Inc 4thFloor,Building10,No.60NanchangRoad,NanchangCommunity,XixiangStreet,Bao'anDistrict,Shenzhen City,China Photo1 Photo2 Externalphotos ShenzhenATATestingLab.Inc 4thFloor,Building10,No.60NanchangRoad,NanchangCommunity,XixiangStreet,Bao'anDistrict,Shenzhen City,China Photo3 Photo4 Externalphotos ShenzhenATATestingLab.Inc 4thFloor,Building10,No.60NanchangRoad,NanchangCommunity,XixiangStreet,Bao'anDistrict,Shenzhen City,China Photo5 Photo6

FCCLabelSample FCCLabelSpecifications TextisBlackincolorandisjustified.Labelsareprintedinindelibleinkonpermanent adhesivebackingorsilk-screenedontotheEUTorshallbeaffixedataconspicuouslocation ontheEUT.WheretheEUTisconstructedintwoormoresectionsconnectedbywiresand marketedtogether,theabovestatementisrequiredtobeaffixedonlytothemaincontrol unit.WhentheEUTissosmallorforsuchusethatitisnotpracticabletoplacethestatement onit,theaboveinformationshallbeplacedinaprominentlocationintheinstructionmanual orpamphletsuppliedtotheuseror,alternatively,shallbeplacedonthecontainerinwhich thedeviceismarketed. FCCLabelLocation Size:8mm*4mm LabelLocation Thisdevicecomplieswithpart15oftheFCCRules.Operationis subjecttothefollowingtwoconditions:(1)Thisdevicemaynotcause harmfulinterference,and(2)thisdevicemustacceptanyinterference received,includinginterferencethatmaycauseundesiredoperation. FCCID:2BX49-DP8000

FCCID:2BX49-DP8000 RFExposureEvaluation Limits Thecriterialistedinthefollowingtableshallbeusedtoevaluatetheenvironmentimpactofhuman exposuretoradiofrequency(RF)radiationasspecifiedin1.1307(b) LimitsforMaximumPermissibleExposure(MPE) Frequencyrange (MHz) Electricfield strength (V/m) Magneticfieldstrength (A/m) Powerdensity (mW/cm2) Averagingtime (minutes) (A)LimitsforOccupational/ControlledExposures 0.3–3.06141.63*(100)6 3.0–301842/f4.89/f*(900/f2)6 30–30061.40.1631.06 300–1500f/3006 1500–100,00056 (B)LimitsforGeneralPopulation/UncontrolledExposure 0.3–1.346141.63*(100)30 1.34–30824/f2.19/f*(180/f2)30 30–30027.50.0730.230 300–1500f/150030 1500–100,0001.030 f=frequencyinMHz 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,wewillknowthedistancerwheretheMPElimitis reached. TestProcedure SoftwareprovidedbyclientenabledtheEUTtotransmitandreceivedataatlowest,middleand highestchannelindividually. TestResultofRFExposureEvaluation BT Mode Outputpower toantenna (dBm) Outputpower toantenna (mW) PowerDensityat R=20cm (mW/cm 2 ) Limit (mW/cm 2 ) Result GFSK6.54.466836 0.00158 1.0PASS Remark:BTantennagain=2.499dBi=1.78 BT:=0.00158<1.0limit SoaSARtestisnotrequired

2.4 GHz–2.48 GHz PCB Antenna SPECIFICATION 1. Antenna Id entification Antenna Manufacturer / YU HAI DI DA TECHNOLOGY LIMITED Manufacturer Address / Rm 701, Unit 108B, 7/F, Twr B New Mandarin Plaza,14 Science Museum RdTsim Sha TsuiHong Kong] Antenna Model / 2.4G PCB ANT] Antenna Type /PCB Antenna – Planar Inverted-F Antenna (PIFA) Frequency Range / 2400–2480 MHz Polarization / Linear Impedance / 50 Ω Peak Gain / 2.499 dBi Average Gain / > -4 dBi VSWR / < 3.2 2. Specification Summary / Parameter / Specification / Frequency2400–2480 MHz Peak Gain2.499 dBi Average Gain> -4 dBi VSWR< 3.2 Impedance50 Ω Antenna TypePCB Antenna – PIFA PolarizationLinear Measurement Information 3. Measurement Procedure 1) Visual inspection and identification: verify the antenna sample, model, physical configuration and test connection before measurement. 2) S-parameter measurement: connect the antenna to a calibrated 50 Ω measurement system and measure S11 over 2400–2480 MHz. Derive VSWR and Return Loss from the measured S11 data. 3) Radiation characteristics: place the antenna in the calibrated anechoic/darkroom antenna measurement system and measure radiation patterns over the specified frequency range. 4) Gain and efficiency: determine antenna gain and radiation efficiency using the laboratory’s calibrated antenna measurement method and applicable reference antenna/system calibration. 5) Data processing: record the frequency-by-frequency results and determine the reported Average and Peak values from the measured dataset. Note: The above wording is a proposed formalized procedure based on the supplied document. The laboratory shall confirm the exact instrument settings, calibration method, measurement distance, scan method, reference antenna and uncertainty treatment against its actual records before release. 4. Test Setup Figure 1. Antenna measurement setup Physical Dimensions Figure 2. Antenna physical dimensions S-Parameters, VSWR and Antenna Performance S-parameter measurement: VSWR, Return Loss and Smith Chart Frequency (MHz)Gain (dBi)Efficiency (%)Average Gain (dBi)Efficiency (dB) 24001.43359.329%-2.717-2.267 24100.92751.861%-3.416-2.852 24200.82952.112%-3.166-2.831 24300.88149.299%-3.258-3.072 24401.19250.672%-3.144-2.952 24501.68853.067%-2.735-2.752 24602.19459.423%-2.276-2.260 24702.11856.680%-2.438-2.466 24802.49961.727%-2.112-2.095 Average1.52954.908%-2.806-2.616 Peak2.49961.727%-2.112-2.095 Note: “Average Gain” and “Efficiency (dB)” are retained using the terminology in the supplied source. Radiation Patterns Figure 3. 2440 MHz 2D-Theta and 2D-Phi patterns / 3 2440 MHz 3D Radiation Patterns Figure 4. 2440 MHz 3D-Horizontal and 3D-Vertical patterns / 4 2440 MHz 3D Total Pattern Figure 5. 2440 MHz 3D-Total pattern / 5 2440 MHz Document control note: Manufacturer information, equipment identification, calibration records, laboratory identity/address, personnel signature and exact measurement settings are intentionally left as controlled fields because they are not present in the supplied source document.

Add:4thFloor,Building10,No.60NanchangRoad,NanchangCommunity,XixiangStreet,Bao'anDistrict,ShenzhenCity,Guangdong,People's RepublicofChina Tel:+860755-82828582Mobilephone:+8613728818899E-mail:[email protected]:www.certata.com TESTREPORT ReportNo............................................:ATA0126080141 FCCID······································:2BX49-DP8000 Applicant .............................................. :YUHAIDIDATECHNOLOGYLIMITED Address.............................................: Rm701,Unit108B,7/F,TwrBNewMandarinPlaza,14Science MuseumRd，TsimShaTsui，HongKong Manufacturer......................................: YUHAIDIDATECHNOLOGYLIMITED Address.............................................: Rm701,Unit108B,7/F,TwrBNewMandarinPlaza,14Science MuseumRd，TsimShaTsui，HongKong ProductName.....................................:DieselHeater TradeMark............................................:N/A TestModel ............................................. :DP8000 SeriesModel(s) .................................... :DP9000,DP8500,DP8000,DP5000,DP7000,DP2000,DP8000V2, DP8000V3,DP8000V4,DP5000V2,DP5000V3,DP9000V2, DP8500V2,DP001,DP002 Standard .............................................. :FCCCFRTitle47Part15SubpartCSection15.247 Testprocedure...................................:ANSIC63.10-2020+Cor.1-2023+C63.10a-2024+Erratato C63.10a-2024 DateofReceipt....................................:Aug.11,2026 DateofTestDate.................................:Aug.11,2026~Aug.24,2026 Dateofissue.........................................:Spe.02,2026 Testresult............................................:Pass Compiledby: (Printedname+signature)LilyZheng Supervisedby: (Printedname+signature)TravisYoung Approvedby: (Printedname+signature)Jasonchen TestingLaboratoryName................:ShenzhenATATestingLab.Inc Address.................................................: 4thFloor,Building10,No.60NanchangRoad,Nanchang Community,XixiangStreet,Bao'anDistrict,ShenzhenCity, China Thistestreportmaybeduplicatedcompletelyforlegalusewiththeapprovaloftheapplicant.Itshouldnotbe reproducedexceptinfull,withoutthewrittenapprovalofourlaboratory.Theclientshouldnotuseittoclaim productendorsementbyATA.Thetestresultsinthereportonlyapplytothetestedsample.Thetestreport shallbeinvalidwithoutallthesignaturesoftestingengineers,reviewerandapprover.Anyobjectionsmustbe raisedtoATAwithin15dayssincethedatewhenthereportisreceived.Itwillnotbetakenintoconsideration beyondthislimit.Thetestreportmerelycorrespondtothetestsample. Add:4thFloor,Building10,No.60NanchangRoad,NanchangCommunity,XixiangStreet,Bao'anDistrict,ShenzhenCity,Guangdong,People's RepublicofChina Tel:+860755-82828582Mobilephone:+8613728818899E-mail:[email protected]:www.certata.com Page 2 of 36 ReportNo.:ATA0126080141 TABLEOFCONTENTSPage 1.TESTSUMMARY................................................................................................................................................................3 1.1.TESTSTANDARDS...................................................................................................................................................................3 1.2.REPORTVERSION...................................................................................................................................................................3 1.3.TESTDESCRIPTION.................................................................................................................................................................4 1.4.TESTFACILITY........................................................................................................................................................................5 1.5.MEASUREMENTUNCERTAINTY.................................................................................................................................................6 1.6.ENVIRONMENTALCONDITIONS.................................................................................................................................................6 2.GENERALINFORMATION...................................................................................................................................................7 2.1.GENERALDESCRIPTIONOFEUT...............................................................................................................................................7 2.2.DESCRIPTIONOFTHETESTMODES..................................................................................................................................8 2.3.BLOCKDIGRAMSHOWINGTHECONFIGURATIONOFSYSTEMTESTED...........................................................................8 2.4.DESCRIPTIONOFNECESSARYACCESSORIESANDSUPPORTUNITS..................................................................................9 2.5.MEASUREMENTINSTRUMENTSLIST........................................................................................................................................10 2.5.TESTSOFTWARE..................................................................................................................................................................11 3.TESTITEMANDRESULTS.................................................................................................................................................12 3.1.ANTENNAREQUIREMENT......................................................................................................................................................12 3.2.CONDUCTEDEMISSION.........................................................................................................................................................13 3.3.BANDEDGEANDSPURIOUSEMISSION(CONDUCTED)................................................................................................................16 3.4.6DBBANDWIDTH.............................................................................................................................................…

Text truncated - open the document above for the full version.