2BTOUZD-JS-4Remote controller

Remote controller ZD-JS-4 Before using remote control, you must press the O button. Press the UP button to extend the jack (raise the trailer). Press the DO button to retract the jack (lower the trailer). Warnrng: Always press the OFF button and slide the cover up when not in use to lock the jack in place and prevent accidental operation. Disconnect the jack from the battery if the unit is not in use for more than a few days to avoid discharging the battery. If your battery becomes weak, the jack will extend more slowly, and the low voltage protection feature will eventually cause it to stop operating. It will be necessary to recharge the battery; then operate the jack in the opposite direction, at least momentarily, before you can continue to extend the jack. UP H U OFF/LOCKED Ê /B É Cover Couvercle DO B S O M CHE Indicator Light Voyant lumineux

* the applicant must designate a contact located in the United States for purposes of acting as the applicant’s agent for service of process, regardless of whether the applicant is a domestic or foreign entity. An applicant located in the United States may designate itself as the agent for service of process. SC5126003 U.S. Agent Designation for Service of Process - Certification Attestation Letter 12/22/2025 TO: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: 2BTOUZD-JS-4 FRN of applicant: 0037751344 Per section 2.911(d)(7) of the FCC rules, Henghong Intelligent Equipment Co.,Ltd FRN:0037751344(“the applicant”) certifies that the equipment for which authorization is sought is designated to the following U.S. agent* for service of process: Company Name: Global Product Services and Consultation LLC FCC Registration Number (FRN): 0033406703 Physical U.S. Company Address: 328 W Palm Ave. Monrovia, CA91016 Contact Person: Michael Chan Tel: +1 626 366 4358 Agent Email Address: [email protected] The above contact person accepts the obligation for service of process. The applicant accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment. Applicant Signed:Agent Signed (if different from Applicant): Signed:Signed: Printed name: Zheng fangmin Title: Manager Company Name: Henghong Intelligent Equipment Co.,Ltd Date: 12/22/2025 Printed name: Michael Chan Title: Technical Director Company Name: Global Product Services and Consultation LLC Date: 12/22/2025

HenghongIntelligentEquipmentCo.,Ltd. CoveredEquipmentCertificationAttestationLetter DATE: Dec.18,2025 FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA ATTN.:ReviewingEngineer FCCID:2BTOUZD-JS-4 (“HenghongIntelligentEquipmentCo.,Ltd.)certifiesthattheequipmentforwhich authorizationissoughtisnot“covered”equipmentprohibitedfromreceivingan equipmentauthorizationpursuanttosection2.903oftheFCCrules. Note:Iftheequipmentforwhichtheapplicantseeksauthorizationisproducedby anyoftheentitiesidentifiedonthecurrentCoveredList,theapplicantshould includeanexplanationonwhytheequipmentisnot“covered”equipment. (“HenghongIntelligentEquipmentCo.,Ltd.”)certifiesthat,asofthedateofthefilingof theapplication,theapplicantisnotidentifiedontheCoveredList(asaspecifically namedentityoranyofitssubsidiariesoraffiliates)asanentityproducing“covered” equipment. (“HenghongIntelligentEquipmentCo.,Ltd.”)certifiesthattheequipmentforwhich authorizationissoughtdoesnotincludecybersecurityoranti-virussoftwareproducedor providedbyKasperskyLab,Inc.oranyofitssuccessorsandassignees,including equipmentwithintegratedKasperskyLab,Inc.(oranyofitssuccessorsandassignees) cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB986446D01 CoveredEquipmentGuidancesectionB(2a). Signed: Printedname:Zhengfangmin Title:Manager CompanyName:HenghongIntelligentEquipmentCo.,Ltd. Date: Dec.18,2025

DATE:December18,2025 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 AuthoritytoActasAgent Onourbehalf,IappointShenzhenDLTestingTechnologyCo.,Ltd. (101-201,ComprehensiveBuilding,TongzhouElectronicsLonggangFactoryArea,No.1 BaolongFifthRoad,BaolongCommunity,BaolongStreet,LonggangDistrict,Shenzhen, China)toactasouragentinthepreparationofthisapplicationforequipmentcertification.I certifythatsubmitteddocumentsproperlydescribethedeviceorsystemforwhichequipment certificationissought.Ialsocertifythateachunitmanufactured,importedormarketed,as definedintheFederalCommunicationsCommission’sregulationswillhaveaffixedtoita labelidenticaltothatsubmittedforapprovalwiththisapplication. Forinstanceswhereourauthorizedagentsignstheapplicationforcertificationonourbehalf, Iacknowledgethatallresponsibilityforcomplyingwiththetermsandconditionsfor certification,stillresideswithHenghongIntelligentEquipmentCo.,Ltd. (No.38KenmaoStreet,YinongTown,Xiaoshan,Hangzhou,Zhejiang,China) <Signature> Name:Zhengfangmin Title:Manager ApplicantCompany:HenghongIntelligentEquipmentCo.,Ltd.

DATE: December18,2025 FederalCommunicationsCommission Authorization&EvaluationDivision 7345OaklandMillsRoad Columbia,Maryland21046 RE:LETTEROFAGENTAUTHORIZATION ToWhomItMayConcern: We,theundersigned,herebyauthorizeComplianceTesting,LLCtoactonourbehalfinallmatters relatingtoapplicationforequipmentauthorization,includingthesigningofalldocumentsrelatingto thesematters. Wealsoherebycertifythatnopartytotheapplicationauthorizedhereunderissubjecttothedenialof benefits,includingFCCbenefits,pursuanttoSection5301oftheAnti-DrugAbuseActof1988,21 U.S.C.853(a). Sincerely, <Signature> Name:Zhengfangmin Title:Manager ApplicantCompany:HenghongIntelligentEquipmentCo.,Ltd.

DATE: December22,2025 EquipmentAutorisationDivision FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 FCCID:2BTOUZD-JS-4 ProductName:Remotecontroller RequestforConfidentiality PursuanttoSections0.457and0.459ofthecommission’srules,weherebyrequestthat thefollowingdocumentsbeheldconfidential: (Listherethedocumentsforwhichyouareseekingconfidentiality–forexample...) Schematics Blockdiagram Operationdescription Thesematerialscontaintradesecretsandproprietaryinformationandarenot customarilyreleasedtothepublic.Thepublicdisclosureofthisinformationmightbe harmfultothecompanyandprovideunjustifiedbenefitstoourcompetitors. <Signature> Name:Zhengfangmin Title:Manager ApplicantCompany:HenghongIntelligentEquipmentCo.,Ltd.

FCCID:2BTOUZD-JS-4ExternalPhoto

LabelLocation FCCID:2BTOUZD-JS-4

FCCID:2BTOUZD-JS-4InternalPhoto RFAntenna

FCCID:2BTOUZD-JS-4 RFExposureEvaluation AccordingtoKDB447498D01GeneralRFExposureGuidancev06andpart2.1093， UnlessspecificallyrequiredbythepublishedRFexposureKDBprocedures,standalone 1-gheadorbodyand10-gextremitySARevaluationforgeneralpopulationexposure conditions,bymeasurementornumericalsimulation,isnotrequiredwhenthe correspondingSARTestExclusionThresholdcondition(s),listedbelow,is(are)satisfied. For100MHzto6GHzandtestseparationdistances≤50mm,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 EIRP=E Meas +20log(d Meas )-104.7 EIRPistheequivalentisotropicallyradiatedpower,indBm E Meas isthefieldstrengthoftheemissionatthemeasurementdistance,indB μ V/m d Meas isthemeasurementdistance,inm Here, Freque ncy (MHz) Field strength (dBuV/ m) Max Power (dBm) Target power W/ tolerance (dBm) Maxtune uppower tolerance (dBm) Max Power (mW) Min. Distance (mm) Calc. threshold s limit 86855.78-39.38-39±1-380.0001585.000.0000303.0

Company:HenghongIntelligentEquipmentCo.,Ltd Address:No.38KenmaoStreet,YinongTown,Xiaoshan,Hangzhou,Zhejiang,China 1.3cm 0.5c m AntennaSpecifications AntennaType:PCBAntenna Frequency:868MHz AntennaGain:-0.58dBi PolarizationHorizontalandVertical AntennaLength Horizontal:868MHz FrequencyGain(dBi) 868MHz MaxMinAvg -0.585582-22.0315-6.59127 Vertical:868MHz FrequencyGain(dBi) 868MHz MaxMinAvg -1.86120-29.5214-9.20432

ShenzhenDLTestingTechnologyCo.,Ltd.ReportNo.:DLE-251215003R TestReportTel:400-688-3552Web:www.dl-cert.comEmail:[email protected] 1 of 26 FCCPart15CTestReport FCCID:2BTOUZD-JS-4 Applicant:HenghongIntelligentEquipmentCo.,Ltd Address:No.38KenmaoStreet,YinongTown,Xiaoshan,Hangzhou,Zhejiang,China Manufacturer:HenghongIntelligentEquipmentCo.,Ltd Address:No.38KenmaoStreet,YinongTown,Xiaoshan,Hangzhou,Zhejiang,China ProductName:Remotecontroller TradeMark: N/A ModelNumber:ZD-JS-4 DateofReceipt:Dec.08,2025 TestDate:Dec.08,2025-Dec.18,2025 DateofReport:Dec.18,2025 PreparedBy:ShenzhenDLTestingTechnologyCo.,Ltd. Address: 101-201,ComprehensiveBuilding,TongzhouElectronicsLonggangFactoryArea,No.1 BaolongFifthRoad,BaolongCommunity,BaolongStreet,LonggangDistrict,Shenzhen, China Applicable Standards: FCCPART15C15.231 ANSIC63.10:2020 TestResult:Pass ReportNumber: DLE-251215003R Prepared(TestEngineer):PxingHuang Reviewer(Supervisor):JackBu Approved(Manager):JadeYang Thistestreportisbasedonasingleevaluationofonesampleofabovementionedproducts.Itisnotpermittedto beduplicatedinextractswithoutwrittenapprovalofShenzhenDLTestingTechnologyCo.,Ltd. ShenzhenDLTestingTechnologyCo.,Ltd.ReportNo.:DLE-251215003R TestReportTel:400-688-3552Web:www.dl-cert.comEmail:[email protected] 2 of 26 TableofContentsPage 1.SUMMARYOFTESTRESULTS...............................................................................4 1.1MEASUREMENTUNCERTAINTY....................................................................................4 2.GENERALINFORMATION........................................................................................5 2.1GENERALDESCRIPTIONOFEUT.................................................................................5 2.2DESCRIPTIONOFTESTMODES..................................................................................5 2.3BLOCKDIGRAMSHOWINGTHECONFIGURATIONOFSYSTEMTESTED..............6 2.4DESCRIPTIONOFSUPPORTUNITS(CONDUCTEDMODE)........................................6 2.5TABLEOFPARAMETERSOFTESTSOFTWARESETTING......................................6 2.6EQUIPMENTSLISTFORALLTESTITEMS...................................................................7 3.EMCEMISSIONTEST...............................................................................................8 3.1CONDUCTEDEMISSIONMEASUREMENT....................................................................8 3.1.1POWERLINECONDUCTEDEMISSIONLimits.....................................................8 3.1.2TESTPROCEDURE.................................................................................................8 3.1.3DEVIATIONFROMTESTSTANDARD....................................................................8 3.1.4TESTSETUP.............................................................................................................9 3.1.5EUTOPERATINGCONDITIONS.............................................................................9 3.1.6TESTRESULTS........................................................................................................9 3.2RADIATEDEMISSIONMEASUREMENT.....................................................................10 3.2.1RADIATEDEMISSIONLIMITS.............................................................................10 3.2.2TESTPROCEDURE..............................................................................................11 3.2.3DEVIATIONFROMTESTSTANDARD................................................................11 3.2.4TESTSETUP.........................................................................................................12 3.2.5EUTOPERATINGCONDITIONS...........................................................................13 3.2.6TESTRESULTS(BETWEEN9KHZ–30MHZ)...................................................14 3.2.7TESTRESULTS(BETWEEN30MHZ–1GHZ)...................................................15 3.2.8TESTRESULTS(1GHZTO10 TH HARMONICS)................................................18 4.BANDWIDTHTEST.................................................................................................19 4.1APPLIEDPROCEDURES/LIMIT..................................................................................19 4.2TESTPROCEDURE..................................................................................................19 4.3DEVIATIONFROMSTANDARD...............................................................................19 4.4TESTSETUP..............................................................................................................19 4.5EUTOPERATIONCONDITIONS..............................................................................19 4.6TESTRESULTS.........................................................................................................20 5.CALCULATIONOFAVERAGEFACTOR................................................................21 5.1APPLIEDPROCEDURES/LIMIT..................................................................................21 5.2TESTPROCEDURE..................................................................................................21 5.3TESTSETUP..............................................................................................................21 ShenzhenDLTestingTechnologyCo.,Ltd.ReportNo.:DLE-251215003R TestReportTel:400-688-3552Web:www.dl-cert.comEmail:[email protected] 3 of 26 TableofContentsPage 5.4EUTOPERATIONCONDITIONS..............................................................................21 5.5TESTRESULTS.........................................................................................................22 6.TRANSMISSIONCEASETIME...............................................................................24 6.1APPLIEDPROCEDURES/LIMIT.................................................................................24 6.2TESTPROCEDURE.................................................................................................24 6.3DEVIATIONFROMSTANDARD.............................…

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FCCID:2BTOUZD-JS-4TestPhoto