2BU4S-HORIZONTALDiesel Heater

Danger! Safety Information • ONLY use this product in accordance with these instructions and ALL local regulations and guidelines related to the use of diesel fuel and heating equipment. Failure to do so may expose you to legal liability and risk serious property damage and severe personal injury, possibly including death. • DO NOT allow children or those unfamiliar with this product to use or install it. Do not use while under the influence of alcohol, drugs, or any medication that negatively affects your judgment or reflexes. Keep children and bystanders away during installation. • Keep your work site clean and well lit. Cluttered and dark work areas invite accidents. • Disconnect the vehicle battery connections before any installation, adjustment, repair, or mainte- nance. • ALWAYS turn off the heater before adding any fuel. • ONLY use DIESEL fuel for the heater. The use of low-quality diesel or other type of fuel may result in malfunctions or even involve risk of fire. • ALWAYS use personal protective equipment (PPE) suitable for your task. Always wear ANSI-ap- proved eye and hand protection while using this product. Nonslip footwear is also highly recom- mended. Other equipment, such as ear, head, and body protection, may also be necessary depending on your work and other equipment. • Dress properly for the installation of the heater. DO NOT wear loose clothing or jewelry and keep hair, clothing, gloves, hoses, and tools away from any moving parts. • The exhaust pipe must be routed to the outside of the vehicle or to an open outdoor area to prevent the accumulation of harmful gas in a enclosed space. • NEVER operate the heater in a confined space without proper ventilation. This can result in the buildup of harmful gases and pose a risk to human health. If you experience any symptoms such as headaches, dizziness, or unconsciousness while operating the heater, immediately stop using the heater and move to a well-ventilated area. If symptoms persist, seek medical attention prompt- ly. It is important to take these symptoms seriously and prioritize your health and safety. • The heater and its components can become hot during operation. Avoid touching them to prevent the risk of burns or injury. ALWAYS wait for components to cool down or use protective gear when handling. • ALWAYS install this heater in a spacious compartment away from any combustible or flammable materials. NEVER use the heater in hazardous locations such as fuel depots, carbon storage, and timber warehouses. • If a fuel leak occurs, turn off the heater IMMEDIATELY and disconnect the fuel line. ONLY use a trained and licensed technician to repair the leak. • Maintain this product. Check for misalignment, binding, wear, or other damage before use. If any damage is detected, repair or replace the problematic components before further use. Only replace components with identical parts. • *Cotton and sponge have a combustion point of 150°C, paper has a combustion point of 130°C, fabric has a combustion point of 270°C, and diesel fuel has a combustion point of 220°C. The temperature of the hot air outlet should not exceed 85°C, while the exhaust pipe outlet temperature can exceed 270°C. ENGLISH Read Carefully Before Use User Manual for Diesel Heater Keep for Future Reference Sicherheitshinweise Gefahr! • • • • • • • • Verwenden Sie dieses Produkt NUR gemäß den Anweisungen und ALLEN lokalen Vorschriften und Richtlinien für die Verwendung von Dieselkraftstoff und Heizgeräten. Das Nichtbefolgen kann zu rechtlichen Konsequenzen führen und erhebliche Sachschäden sowie schwere persönliche Verletzungen, möglicher- weise mit Todesfolge, nach sich ziehen. Kinder oder Personen, die mit diesem Produkt nicht vertraut sind, dürfen es nicht verwenden oder installieren. Verwenden Sie es nicht unter dem Einfluss von Alkohol, Drogen oder Medikamenten, die Ihr Urteilsvermögen oder Ihre Reflexe negativ beeinflussen. Halten Sie Kinder und Zuschauer während der Installation fern. Halten Sie Ihren Arbeitsbereich sauber und gut beleuchtet. Unordentliche und dunkle Arbeitsbereiche erhöhen das Unfallrisiko. Trennen Sie vor jeder Installation, Einstellung, Reparatur oder Wartung die Batterieverbindungen des Fahrze- ugs. Schalten Sie IMMER die Heizung aus, bevor Sie Kraftstoff hinzufügen. Verwenden Sie nur Dieselkraftstoff für die Heizung. Die Verwendung von minderwertigem Diesel oder anderen Kraftstoffarten kann zu Fehlfunktionen führen und sogar Brandgefahr darstellen. Verwenden Sie IMMER persönliche Schutzausrüstung (PSA), die für Ihre Aufgabe geeignet ist. Tragen Sie immer eine von ANSI zugelassene Augen- und Handenschutzmittel bei Verwendung dieses Produkts. Rutschfeste Schuhe werden ebenfalls dringend empfohlen. Je nach Ihrer Arbeit und anderen Geräten können auch andere Schutzausrüstungen wie Gehörschutz, Kopfschutz und Körperschutz erforderlich sein. Kleiden Sie sich angemessen für die Installation des Heizgeräts. Tragen Sie KEINE locker sitzende Kleidung oder Schmuck und halten Sie Haare, Kleidung, Handschuhe, Schläuche und Werkzeuge von beweglichen Teilen fern. Das Abgasrohr muss nach außen oder in einen offenen Außenbereich geführt werden, um die Ansammlung von schädlichen Gasen in einem geschlossenen Raum zu vermeiden. Betreiben Sie das Heizgerät NIE in einem geschlossenen Raum ohne ausreichende Belüftung. Dadurch können schädliche Gase entstehen und ein Risiko für die menschliche Gesundheit darstellen. Wenn Sie während des Betriebs des Heizgeräts Symptome wie Kopfschmerzen, Schwindel oder Bewusstlosigkeit bemerken, beenden Sie sofort die Verwendung des Heizgeräts und gehen Sie an einen gut belüfteten Bereich. Wenn die Symptome anhalten, suchen Sie umgehend ärztliche Hilfe auf. Nehmen Sie diese Symptome ernst und geben Sie Ihrer Gesundheit und Sicherheit Vorrang. Der Heizer und seine Komponenten können während des Betriebs heiß werden. Vermeiden Sie das Berühren, um das Risiko von Verbrennungen oder Verletzungen zu vermeiden. Warten Sie IM…

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BengbuLongheE-commerceCo.,Ltd. 1|Page AttestationStatements To:FederalCommunicationsCommissionDate:Mar.21,26 7435OaklandMillsRoad, Columbia,MD21046,USA Subject:AttestationofCompliancewithFCCCoveredListSoftwareRequirements FCCID:2BU4S-HORIZONTAL ProductName:DieselHeater Thisletterservesasanattestationthattheequipmentidentifiedabove☐is/☒isnot(selectone)"covered" softwareasdefinedundertheFederalCommunicationsCommission(FCC)CoveredListrequirements,as outlinedinFCC22-84andKDB986446. Specifically,theundersignedcertifiesthattheequipmentforwhichauthorizationissought: 1.Doesnotcontaincybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab, Inc.oranyofitssuccessors,assignees,parents,subsidiaries,affiliates,oranyentitythathasrebranded orrelabeledsoftwareproducedbytheaforementionedentities. 2.Doesnothavethecapabilitytostore,run,ordeliveranysoftwareidentifiedontheFCCCoveredList, includingbutnotlimitedtocybersecurityandanti-virussoftware. Tosupportthisattestation,theappendixevaluationdocumentationhasbeenpreparedandisincludedinthe certificationfiling. Thisattestationisbasedonathoroughevaluationofthedevice'sdesign,functionality,andsoftware environment.Theundersignedaffirmsthattheinformationprovidedisaccurateandcompletetothebestof theirknowledge. Sincerelyyours ApplicantSignature PrintedName:YiHuang Title:Manager Address:Room2510,TowerA,FenghuangInt'lBldg,BengshanDist,BengbuCity,AnhuiProvince,P.R.China Tel.:+8619056023673 Email:[email protected] BengbuLongheE-commerceCo.,Ltd. 2|Page EvaluationregardingtotheCoveredListSoftware: Compliance Methodology EvaluationProcessResults Deviceis Inherent compliance ☒ TheChipset(s)usedislimitedtorun theCybersecurityoranti-virus software. Compliance. ☒ TheMemoryusedislimitedtorunthe Cybersecurityoranti-virussoftware. Compliance. ☒ Thereisstoragecapacitylimitationfor storeorinstalltheCybersecurityor anti-virussoftware. Compliance. ☒ Operatingsystemusedislimitedto run,installordelivertheCybersecurity oranti-virussoftware. Compliance. Deviceisnot Inherent compliance ☐ EvaluationBasedonSoftware BillofMaterials(SBoM) Seeattached“SBoM“ Note:TheSBoMcontentislimited tothescopeofcoveredlist software(e.g.antivirusand cybersecuritysoftware). ☐ EvaluationBasedonScanfor Softwareonthedevice ☐ EvaluationBasedonFilesystemscan ☐ EvaluationBasedonRunning softwarecheck

BengbuLongheE-commerceCo.,Ltd. U.S.AgentLetterofAttestation To:FederalCommunicationsCommission 7435OaklandMillsRoad,Columbia,MD21046,USA Date:Mar.21,26 Ref: AttestationStatement–Part 2.911(d)(7)filing FCCID:2BU4S-HORIZONTAL [BengbuLongheE-commerceCo.,Ltd.](“theapplicant”)certifiesthat,asofthedateofthefilingof theapplication,[TRANS-PACCHINALLC](“theagent”)isourdesignatedU.S.agentforserviceof processfortheabovereferenceFCCID.Theapplicantacceptstomaintainanagentforserviceof processintheUnitedStatesfornolessthanoneyearaftereitherthegranteehaspermanently terminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S.,orthe conclusionofanyCommission-relatedadministrativeorjudicialproceedinginvolvingtheequipment, whicheverislater.TheapplicantfurtheracknowledgesitisourresponsibilitytoinformtheFCC whenevertheagentinformationchanges. [TRANS-PACCHINALLC]("theagent)understanditistheagent'sobligationtoacceptserviceof processintheUnitedStatesformattersrelatedtotheapplicableequipment,andatthephysicalU.S. addressandemailaddress. DesignatedU.S.Agent CompanyName:TRANS-PACCHINALLC FRN:0036394526 3715S182ndStreet,C120Seatac,WA98188United States Signature: ContactPerson:LisaLee Tel:(818)818-0538 Email:[email protected] Applicant CompanyName:BengbuLongheE-commerceCo.,Ltd. FRN:0037901089 Address:Room2510,TowerA,FenghuangInt'lBldg, BengshanDist,BengbuCity,Anhui Province,P.R.China Signature: ContactPerson:YiHuang Tel:+8619056023673Email: [email protected]

BengbuLongheE-commerceCo.,Ltd. AttestationStatements NotCoveredEntityApplicant&NotCoveredEquipment To:FederalCommunicationsCommissionDate:Mar.21,26 7435OaklandMillsRoad, Columbia,MD21046,USA Ref:InformationRequiredbySection2.911(d)(5)(i)&(ii) FCCID: 2BU4S-HORIZONTAL BengbuLongheE-commerceCo.,Ltd.(“theapplicant”)certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredList,establishedpursuantto§1.50002of referencechapter,asanentityproducing“covered”communicationequipment.Theequipmentfor whichauthorizationissoughtisnot“covered”telecommunicationsequipmentandvideosurveillance equipmentproducedbyentitiesidentifiedontheCommission’sCoveredListthatprohibitedfrom receivinganequipmentauthorizationpursuanttosection§2.903oftheFCCrules. Sincerelyyours, ApplicantSignature PrintedName:YiHuang Title:Manager Address：Room2510,TowerA,FenghuangInt'lBldg,BengshanDist,BengbuCity,Anhui Province,P.R.China Tel.:+8619056023673 Email:[email protected]

BengbuLongheE-commerceCo.,Ltd. (Mar.21,26) FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 Subject:ConfidentialityRequestfor:FCCID: 2BU4S-HORIZONTAL PursuanttoSections0.457and0.459oftheCommission’sRules,weherebyrequestpermanent confidentialtreatmentoftheexhibitsaccompanyingthiscertificationapplicationasoutlinedbelow:  BlockDiagram Schematics  OperationalDescription Theaboveexhibitscontaintradesecretsand/orproprietaryinformationthatarenotpubliclyavailableand materialsthattheApplicanthasspentconsiderableeffortsindeveloping.Publicdisclosureofthesemay beharmfultotheApplicantandgiveanunfairadvantagetocompetitorsonthemarket. Sincerely, (Signature) Title:Manager Address:Room2510,TowerA,FenghuangInt'lBldg,BengshanDist,BengbuCity,Anhui Province,P.R.China Tel.:+8619056023673 Email:[email protected]

Bengbu Longhe E-commerce Co., Ltd. (Mar, 09, 2025) Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization for FCC ID: 2BU4S-HORIZONTAL I, the undersigned, hereby authorize (HD TESTING TECHNOLOGY (GUANGDONG) CO., LTD.) to act on our behalf in all matters relating to this application for equipment certification. Any act carried out by (HD TESTING TECHNOLOGY (GUANGDONG) CO., LTD.) shall have the same effect as our own and I acknowledge that all responsibility for complying with the terms and conditions of certification, as specified by DERYCOM CERTIFICATION SERVICES, INC., still resides with Bengbu Longhe E-commerce Co., Ltd. We certify that we are not subject to a denial of federal benefits that includes FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. §862, and that no party to the application, as defined in 47 CFR §1.2002(b), is subject to a denial of federal benefits that includes FCC benefits pursuant to that section. Sincerely, (Signature) (Yi Huang) (Manager) Tel: +86 19056023673 Email:[email protected]

FCCID:2BU4S-HORIZONTAL Page 1 / 5 PHOTOSOFEUTEXTERNALPHOTOS EUTPhoto EUTPhoto FCCID:2BU4S-HORIZONTAL Page 2 / 5 EUTPhoto EUTPhoto FCCID:2BU4S-HORIZONTAL Page 3 / 5 EUTPhoto EUTPhoto FCCID:2BU4S-HORIZONTAL Page 4 / 5 EUTPhoto EUTPhoto FCCID:2BU4S-HORIZONTAL Page 5 / 5 EUTPhoto

FCCID:2BU4S-HORIZONTAL

FCCID:2BU4S-HORIZONTAL Page 1 / 3 PHOTOSOFEUTINTERNALPHOTOS EUTPhoto EUTPhoto FCCID:2BU4S-HORIZONTAL Page 2 / 3 EUTPhoto EUTPhoto FCCID:2BU4S-HORIZONTAL Page 3 / 3 EUTPhoto EUTPhoto PCBAntenna

ReportNo.:86260323255Date:March27,2026Page1of5 HDTestingTechnology(GuangDong)Co.,Ltd. Building1,No.18,ShihuanRoad,DongchengSubdistrict, Dongguan,Guangdong,China Tel:+86-0769-22221088 E-mail:[email protected] Website:www.hdt-lab.com Thisreportisgovernedby,andincorporatesbyreference,theconditionsoftestingaspostedatthe dateofissuanceofthisreportathttp://www.hdt-lab.com/andisintendedforyourexclusiveuse.Any copyingorreplicationofthisreporttoorforanyotherpersonorentity,oruseofournameortrademark, ispermittedonlywithourpriorwrittenpermission.Thisreportsetsforthourfindingssolelywithrespect tothetestsamplesidentifiedherein.Theresultssetforthinthisreportarenotindicativeor representativeofthequalityorcharacteristicsofthelotfromwhichatestsamplewastakenorany similaroridenticalproductunlessspecificallyandexpresslynoted.Ourreportincludesallofthetests requestedbyyouandtheresultsthereofbasedupontheinformationthatyouprovidedtous. Measurementuncertaintyisonlyprovideduponrequestforaccreditedtests.Statementsofconformity arebasedonsimpleacceptancecriteriawithouttakingmeasurementuncertaintyintoaccount,unless otherwiserequestedinwriting.Youhave15daysfromdateofissuanceofthisreporttonotifyusofany materialerrororomissioncausedbyournegligenceorifyourequiremeasurementuncertainty; provided,however,thatsuchnoticeshallbeinwritingandshallspecificallyaddresstheissueyouwish toraise.Afailuretoraisesuchissuewithintheprescribedtimeshallconstituteyourunqualified acceptanceofthecompletenessofthisreport,thetestsconductedandthecorrectnessofthereport contents. RFTESTREPORT Applicant:BengbuLongheE-commerceCo.,Ltd. Address: Room2510,TowerA,FenghuangInt'lBldg,BengshanDist,BengbuCity,Anhui Province,P.R.China Manufacturer:BengbuLongheE-commerceCo.,Ltd. Address: Room2510,TowerA,FenghuangInt'lBldg,BengshanDist,BengbuCity,Anhui Province,P.R.China EUTName:DieselHeater Trademark:/ Model:Horizontal FCCID：2BU4S-HORIZONTAL Rating:DC12-24V,3A SampleReceived Date: Mar.23,2026 TestDate:Mar.23,2026~Mar.26,2026 Applicable Standards: CFR47,FCCPart2.1091 TestResultPass Preparedby:Approvedby: EvanFang/ProjectEngineerBruceZhang/TechnicalManager ReportNo.:86260323255 March27,2026 Page2of5 HDTestingTechnology(GuangDong)Co.,Ltd. Building1,No.18,ShihuanRoad,DongchengSubdistrict, Dongguan,Guangdong,China Tel:+86-0769-22221088 E-mail:[email protected] Website:www.hdt-lab.com Thisreportisgovernedby,andincorporatesbyreference,theconditionsoftestingaspostedatthe dateofissuanceofthisreportathttp://www.hdt-lab.com/andisintendedforyourexclusiveuse.Any copyingorreplicationofthisreporttoorforanyotherpersonorentity,oruseofournameortrademark, ispermittedonlywithourpriorwrittenpermission.Thisreportsetsforthourfindingssolelywithrespect tothetestsamplesidentifiedherein.Theresultssetforthinthisreportarenotindicativeor representativeofthequalityorcharacteristicsofthelotfromwhichatestsamplewastakenorany similaroridenticalproductunlessspecificallyandexpresslynoted.Ourreportincludesallofthetests requestedbyyouandtheresultsthereofbasedupontheinformationthatyouprovidedtous. Measurementuncertaintyisonlyprovideduponrequestforaccreditedtests.Statementsofconformity arebasedonsimpleacceptancecriteriawithouttakingmeasurementuncertaintyintoaccount,unless otherwiserequestedinwriting.Youhave15daysfromdateofissuanceofthisreporttonotifyusofany materialerrororomissioncausedbyournegligenceorifyourequiremeasurementuncertainty; provided,however,thatsuchnoticeshallbeinwritingandshallspecificallyaddresstheissueyouwish toraise.Afailuretoraisesuchissuewithintheprescribedtimeshallconstituteyourunqualified acceptanceofthecompletenessofthisreport,thetestsconductedandthecorrectnessofthereport contents. RevisionHistory VersionDateofIssueDescription V00March27,2026OriginalVersion ReportNo.:86260323255 March27,2026 Page3of5 HDTestingTechnology(GuangDong)Co.,Ltd. Building1,No.18,ShihuanRoad,DongchengSubdistrict, Dongguan,Guangdong,China Tel:+86-0769-22221088 E-mail:[email protected] Website:www.hdt-lab.com Thisreportisgovernedby,andincorporatesbyreference,theconditionsoftestingaspostedatthe dateofissuanceofthisreportathttp://www.hdt-lab.com/andisintendedforyourexclusiveuse.Any copyingorreplicationofthisreporttoorforanyotherpersonorentity,oruseofournameortrademark, ispermittedonlywithourpriorwrittenpermission.Thisreportsetsforthourfindingssolelywithrespect tothetestsamplesidentifiedherein.Theresultssetforthinthisreportarenotindicativeor representativeofthequalityorcharacteristicsofthelotfromwhichatestsamplewastakenorany similaroridenticalproductunlessspecificallyandexpresslynoted.Ourreportincludesallofthetests requestedbyyouandtheresultsthereofbasedupontheinformationthatyouprovidedtous. Measurementuncertaintyisonlyprovideduponrequestforaccreditedtests.Statementsofconformity arebasedonsimpleacceptancecriteriawithouttakingmeasurementuncertaintyintoaccount,unless otherwiserequestedinwriting.Youhave15daysfromdateofissuanceofthisreporttonotifyusofany materialerrororomissioncausedbyournegligenceorifyourequiremeasurementuncertainty; provided,however,thatsuchnoticeshallbeinwritingandshallspecificallyaddresstheissueyouwish toraise.Afailuretoraisesuchissuewithintheprescribedtimeshallconstituteyourunqualified acceptanceofthecompletenessofthisreport,thetestsconductedandthecorrectnessofthereport contents. 1.EUTDESCRIPTION Product:DieselHeater TestModel:Horizontal AdditionalModel:N/A Rating:DC12-24V,3A FCCID:2BU4S-HORIZONTAL AntennaType:PCBAntenna AntennaGain:5.3dBi OperationFrequency:2402-2480MHz NumberofChannels:40 ModulationType:GFSK HardwareVersion:N/A SoftwareVersion:N/A Note: 1)Foramoredetailedfeaturesdescription,pleaserefertothemanufacturer'sspecificationsorthe User'sManual. 2)Antennagainwasprovidedbytheapplicant/manufacturer,andtheapplicant/manufactureris responsibleforitsvalidity. 3)Thetestresultsinthereportonlyapplytothetestedsample. ReportNo.:86260323255 March27,2026 Page4of5 HDTestingTechnology(GuangDong)Co.,Ltd. Building1,No.18,ShihuanRoad,DongchengSubdistrict, Dongguan,Guangdong,China Tel:+86-0769-22221088 E…

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ReportNo.:86260323254Date:March27,2026Page1of33 HDTestingTechnology(GuangDong)Co.,Ltd. Building1,No.18,ShihuanRoad,DongchengSubdistrict, Dongguan,Guangdong,China Tel:+86-0769-22221088 E-mail:[email protected] Website:www.hdt-lab.com Thisreportisgovernedby,andincorporatesbyreference,theconditionsoftestingaspostedatthe dateofissuanceofthisreportathttp://www.hdt-lab.com/andisintendedforyourexclusiveuse.Any copyingorreplicationofthisreporttoorforanyotherpersonorentity,oruseofournameortrademark, ispermittedonlywithourpriorwrittenpermission.Thisreportsetsforthourfindingssolelywithrespect tothetestsamplesidentifiedherein.Theresultssetforthinthisreportarenotindicativeor representativeofthequalityorcharacteristicsofthelotfromwhichatestsamplewastakenorany similaroridenticalproductunlessspecificallyandexpresslynoted.Ourreportincludesallofthetests requestedbyyouandtheresultsthereofbasedupontheinformationthatyouprovidedtous. Measurementuncertaintyisonlyprovideduponrequestforaccreditedtests.Statementsofconformity arebasedonsimpleacceptancecriteriawithouttakingmeasurementuncertaintyintoaccount,unless otherwiserequestedinwriting.Youhave15daysfromdateofissuanceofthisreporttonotifyusofany materialerrororomissioncausedbyournegligenceorifyourequiremeasurementuncertainty; provided,however,thatsuchnoticeshallbeinwritingandshallspecificallyaddresstheissueyouwish toraise.Afailuretoraisesuchissuewithintheprescribedtimeshallconstituteyourunqualified acceptanceofthecompletenessofthisreport,thetestsconductedandthecorrectnessofthereport contents. RFTESTREPORT Applicant:BengbuLongheE-commerceCo.,Ltd. Address: Room2510,TowerA,FenghuangInt'lBldg,BengshanDist,BengbuCity,Anhui Province,P.R.China Manufacturer:BengbuLongheE-commerceCo.,Ltd. Address: Room2510,TowerA,FenghuangInt'lBldg,BengshanDist,BengbuCity,Anhui Province,P.R.China EUTName:DieselHeater Trademark:/ Model:Horizontal FCCID：2BU4S-HORIZONTAL Rating:DC12-24V,3A SampleReceived Date: Mar.23,2026 TestDate:Mar.23,2026~Mar.26,2026 Applicable Standards: FCC47,CFRPart15.247 TestResultPass Preparedby:Approvedby: EvanFang/ProjectEngineerBruceZhang/TechnicalManager ReportNo.:86260323254 March27,2026 Page2of33 HDTestingTechnology(GuangDong)Co.,Ltd. Building1,No.18,ShihuanRoad,DongchengSubdistrict, Dongguan,Guangdong,China Tel:+86-0769-22221088 E-mail:[email protected] Website:www.hdt-lab.com Thisreportisgovernedby,andincorporatesbyreference,theconditionsoftestingaspostedatthe dateofissuanceofthisreportathttp://www.hdt-lab.com/andisintendedforyourexclusiveuse.Any copyingorreplicationofthisreporttoorforanyotherpersonorentity,oruseofournameortrademark, ispermittedonlywithourpriorwrittenpermission.Thisreportsetsforthourfindingssolelywithrespect tothetestsamplesidentifiedherein.Theresultssetforthinthisreportarenotindicativeor representativeofthequalityorcharacteristicsofthelotfromwhichatestsamplewastakenorany similaroridenticalproductunlessspecificallyandexpresslynoted.Ourreportincludesallofthetests requestedbyyouandtheresultsthereofbasedupontheinformationthatyouprovidedtous. Measurementuncertaintyisonlyprovideduponrequestforaccreditedtests.Statementsofconformity arebasedonsimpleacceptancecriteriawithouttakingmeasurementuncertaintyintoaccount,unless otherwiserequestedinwriting.Youhave15daysfromdateofissuanceofthisreporttonotifyusofany materialerrororomissioncausedbyournegligenceorifyourequiremeasurementuncertainty; provided,however,thatsuchnoticeshallbeinwritingandshallspecificallyaddresstheissueyouwish toraise.Afailuretoraisesuchissuewithintheprescribedtimeshallconstituteyourunqualified acceptanceofthecompletenessofthisreport,thetestsconductedandthecorrectnessofthereport contents. RevisionHistory VersionDateofIssueDescription V00March27,2026OriginalVersion ReportNo.:86260323254 March27,2026 Page3of33 HDTestingTechnology(GuangDong)Co.,Ltd. Building1,No.18,ShihuanRoad,DongchengSubdistrict, Dongguan,Guangdong,China Tel:+86-0769-22221088 E-mail:[email protected] Website:www.hdt-lab.com Thisreportisgovernedby,andincorporatesbyreference,theconditionsoftestingaspostedatthe dateofissuanceofthisreportathttp://www.hdt-lab.com/andisintendedforyourexclusiveuse.Any copyingorreplicationofthisreporttoorforanyotherpersonorentity,oruseofournameortrademark, ispermittedonlywithourpriorwrittenpermission.Thisreportsetsforthourfindingssolelywithrespect tothetestsamplesidentifiedherein.Theresultssetforthinthisreportarenotindicativeor representativeofthequalityorcharacteristicsofthelotfromwhichatestsamplewastakenorany similaroridenticalproductunlessspecificallyandexpresslynoted.Ourreportincludesallofthetests requestedbyyouandtheresultsthereofbasedupontheinformationthatyouprovidedtous. Measurementuncertaintyisonlyprovideduponrequestforaccreditedtests.Statementsofconformity arebasedonsimpleacceptancecriteriawithouttakingmeasurementuncertaintyintoaccount,unless otherwiserequestedinwriting.Youhave15daysfromdateofissuanceofthisreporttonotifyusofany materialerrororomissioncausedbyournegligenceorifyourequiremeasurementuncertainty; provided,however,thatsuchnoticeshallbeinwritingandshallspecificallyaddresstheissueyouwish toraise.Afailuretoraisesuchissuewithintheprescribedtimeshallconstituteyourunqualified acceptanceofthecompletenessofthisreport,thetestsconductedandthecorrectnessofthereport contents. TABLEOFCONTENTS 1.TESTSUMMARY.....................................................................................................................4 2.TESTSITE...............................................................................................................................5 2.1.TestFacility........................................................................................................................................5 2.2.MeasurementUncertainty..................................................................................................................5 2.3.TestEnvironmentCondition...............................................................................................................5 3.…

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Summary ANTENNASPECIFICATION ITEMANTSPEC ModelName2.4GANT AntennaplatePCBantenna FREQUENCERANGE2400-500MHz Gain5.3DBI PolarizationHorizontalandVertical Impedance50Ohm SWR ≦1.5 AntennaPhoto&Length(mm) SWR(FREQUENCERANGE:2400-2500MHz) F Frequence:2400MHz2450MHz2500MHz Gain: ≧ 5dbi

FCCID:2BU4S-HORIZONTAL 1/7 AppendixA:TestResultsofBluetoothBLE ConductedOutputPower TestResult ModeChannel PeakOutput Power (dBm) PeakOutput Power (mW) Max.Avg. Power (dBm) Limit (dBm) Result BLE1M 03.302.14None≤30PASS 192.861.93None≤30PASS 392.851.93None≤30PASS TestGraphs PeakOutputPower BLE1M_Channel0 PeakOutputPower BLE1M_Channel19 PeakOutputPower BLE1M_Channel39 FCCID:2BU4S-HORIZONTAL 2/7 99%Bandwidth TestResult ModeChannelCenterFrequency(MHz)99%BW(MHz) BLE1M024021.0411 BLE1M1924401.0366 BLE1M3924801.0393 TestGraphs BLE1M_Channel0BLE1M_Channel19 BLE1M_Channel39 FCCID:2BU4S-HORIZONTAL 3/7 6dBBandwidth TestResult ModeChannel CenterFrequency (MHz) 6dBBandwidth (MHz) Limit (MHz) Result BLE1M 024020.6637 ≥0.5 PASS 1924400.6693PASS 3924800.6635PASS TestGraphs BLE1M_Channel0BLE1M_Channel19 BLE1M_Channel39 FCCID:2BU4S-HORIZONTAL 4/7 ConductedSpurious&BandEdgeEmission TestResult ModeChannel OOBEmission Frequency (MHz) OOBEmission Level (dBm) Limit (dBm) OverLimit (dB) Result BLE1M 0 2400.00-49.822-16.99-32.832PASS 7207.00-37.312-16.99-20.322PASS 197319.37-37.689-17.43-20.259PASS 39 2483.50-57.176-17.51-39.666PASS 7439.22-43.037-17.51-25.527PASS Note:inputcompensationcoeffcient(dB)=CableLoss(dB) TestGraphs In-BandReferenceLevel BLE1M_Channel0 OutOfBandEmission BLE1M_Channel0 30.0MHz-25000.0MHz BLE1M_Channel0 In-BandReferenceLevel BLE1M_Channel19 FCCID:2BU4S-HORIZONTAL 5/7 30.0MHz-25000.0MHz BLE1M_Channel19 In-BandReferenceLevel BLE1M_Channel39 OutOfBandEmission BLE1M_Channel39 30.0MHz-25000.0MHz BLE1M_Channel39 FCCID:2BU4S-HORIZONTAL 6/7 DutyCycle TestResult ModeChannelOnTime(ms)Period(ms) DutyCycle (%) DutyCycle (linear) DutyCycle Factor(dB) 1/T BLE1M 01.3011.87569.410.69411.58580.7686 191.3021.87469.440.69441.58390.7680 391.3021.87469.440.69441.58390.7680 TestGraphs BLE1M_Channel0BLE1M_Channel19 BLE1M_Channel39 FCCID:2BU4S-HORIZONTAL 7/7 PowerSpectralDensity TestResult ModeChannelPSD(dBm/3kHz)Limit(dBm/3kHz)Result BLE1M0-12.550≤8PASS BLE1M19-12.850≤8PASS BLE1M39-13.040≤8PASS TestGraphs BLE1M_Channel0BLE1M_Channel19 BLE1M_Channel39

FCCID:2BU4S-HORIZONTAL Page 1 / 2 ConductedEmissiononACMains RadiatedSpuriousEmissionBelow1GHz FCCID:2BU4S-HORIZONTAL Page 2 / 2 RadiatedSpuriousEmissionAbove1GHz