2BWYWOPT28-GPOPT28-GP

98 98 FCC Warning 15.19 Labeling requirements. 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. 15.21 Information to user. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 15.105 Information to the user. 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. FCC RF Exposure Warning Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment can be used in portable exposure conditions.

TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED. FederalCommunicationsCommission AuthorizationandEvaluationDivision EquipmentAuthorizationBranch 7435OaklandMillsRoad Columbia,MD21046 [2026-07-16] U.S.AgentDesignation [TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED.]acknowledgestheirconsentforthefollowingcontactlocated intheUnitedStatestoactastheiragentforserviceofprocessfortheequipmentforwhichauthorizationissought (FCCID:2BWYWOPT28-GP): NameandcompanyofU.S.agent:[GLOCERTSTECHNOLOGYINC] PhysicalU.S.addressofagent:[19784SUNKISSEDRIDGEDR,RIVERSIDE,CA92507] FRNofU.S.agent:[0036339737] EmailaddressofU.S.agent:[[email protected]] TelephoneofU.S.agent:(626)588-8039 [GLOCERTSTECHNOLOGYINC]acknowledgestheirobligationtoacceptserviceofprocessonbehalfof [TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED.]. [TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED.]withtheFRN[0038634010]acceptsitsobligation tomaintainanagentforserviceofprocessintheUnitedStatesfornolessthan1yearaftereitherthegranteehas permanentlyterminatedallmarketingandimportationoftheapplicableequipmentwithintheU.S.,orthe conclusionofanyCommission-relatedadministrativeorjudicialproceedinginvolvingtheequipment,whicheveris later. Bysigningthisform,weconfirmtheaboveandthatweareawareoftheapplicationrequirementslistedunder§ 2.911(d)(7). TheinformationprovidedinthisletterisbasedonthereferencedrulepartsofTitle47oftheCFRaswellasKDB 986446D01. Sincerely, SignatureSignature [XinpuXie][HuiyingFan] [GeneralManager][Director] [TANGCAI(HK)IMPORTI& EXPORTCO.,LIMITED] [GLOCERTSTECHNOLOGYINC]

Rev1/26/2023 TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:07-16-2026 Ref:AttestationStatementsPart2.911(d)(5)(i)Filing FCCID:2BWYWOPT28-GP TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED.certifiesthattheequipmentforwhichauthorizationis soughtisnot“covered”equipmentprohibitedfromreceivinganequipmentauthorizationpursuantto section2.903oftheFCCrules. TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED.certifiesthattheequipmentforwhichauthorizationis soughtdoesnotincludecybersecurityoranti-virussoftwareproducedorprovidedbyKasperskyLab,Inc. oranyofitssuccessorsandassignees,includingequipmentwithintegratedKasperskyLab,Inc.(oranyof itssuccessorsandassignees)cybersecurityoranti-virussoftwarepursuanttoDA-24-886andKDB 986446D01CoveredEquipmentGuidancesectionB(2a). Deviceisinherentlycompliantbasedonhardwarelimitationsorsoftwarecontrols. or ASoftwareBillofMaterials(SBOM)isprovidedtotheTCBforreview,and Theend-userorthirdpartiescannotinstalladditionalsoftwareonthisdevice. Sincerely, Rev1/26/2023 TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED. FederalCommunicationsCommission AuthorizationandEvaluationDivision 7435OaklandMillsRoad Columbia,MD21046 USA Date:07-16-2026 Ref:AttestationStatementsPart2.911(d)(5)(ii)Filing FCCID:2BWYWOPT28-GP TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED.certifiesthat,asofthedateofthefilingofthe application,theapplicantisnotidentifiedontheCoveredList(asaspecificallynamedentityoranyofits subsidiariesoraffiliates)asanentityproducing“covered”equipment. Sincerely,

TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED. Date：2026.07.16 ProductModelNumber:OPT28-GP FCCID:2BWYWOPT28-GP Towhomitmayconcern, Re:ProductCertificationRepresentativeAuthorizationLetter WeauthorizeQAILaboratoriesLtd.3980NorthFraserWay,BurnabyB.C. CanadaV5J5K5toactonourbehalfonallmattersconcerningtheabove namedequipment. Thisshallincludethefollowing: Testing Approvalapplicationsandprocedures WedeclarethatQAILaboratoriesLtd.isallowedtoforwardallinformation relatedtotheapprovalprojecttotheappliedcertificationbodyandtothe notificationentitiesandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyQAILaboratoriesLtd.onour behalfshallhavethesameeffectasactsofourown. By: Title:XinpuXie Email:[email protected] Telephone:17727861920 Onbehalfof:TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED.

TANGCAI(HK)IMPORTI&EXPORTCO.,LIMITED. OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:July17,2026 Subject;RequestforConfidentiality FCCID:2BWYWOPT28-GP 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:XinpuXie Title:GeneralManager

FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 6 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Appendix II External Photos FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 2 of 6 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 3 of 6 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 4 of 6 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 5 of 6 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 6 of 6 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00

LabelLocation LabelSizeL*W:140mm*50mm OPT28-GP Model:OPT28-GP FCCID:2BWYWOPT28-GP Thisdevicecomplieswithpart15oftheFCCRules.Operationissubjecttothe followingtwoconditions:(1)Thisdevicemaynotcauseharmfulinterference, and(2)thisdevicemustacceptanyinterferencereceived,including interferencethatmaycauseundesiredoperation.

FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 3 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Appendix III Internal Photos FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 2 of 3 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 3 of 3 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00

Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 9 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdon g, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Health Test Report For Applicant name: TANGCAI(HK)IMPORTI& EXPORTCO.,LIMITED. Address: Unit 127, Room 701, 7/F, Block B, New Mandarin Centre, 14 Science Museum Road, Tsim Sha Tsui, Hong Kong EUT name: OPT28-GP Brand name: N/A Model number: OPT28-GP FCC ID: 2BWYWOPT28-GP Issued By Company name: BTF Testing Lab (Shenzhen) Co., Ltd. Address: Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Report number: BTF260709R00202 Test standards: 47 CFR Part 2 Subpart J Section 2.1093 Test conclusion: Pass Date of sample receipt: 2026-07-09 Test date: 2026-07-09 to 2026-07-13 Date of issue: 2026-07-13 Prepared by: Approved by: Zac.zhou/ Project engineer Ryan.CJ / EMC Manager Note: All the test results in this report only related to the testing samples. Which can be duplicated completely for the legal use with approval of applicant; it shall not be reproduced except in full without the written approval of BTF Testing Lab (Shenzhen) Co., Ltd., All the objections should be raised within thirty days from the date of issue. To validate the report, you can contact us. Report Number: BTF260709R00202 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 2 of 9 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdon g, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Revision History Version Issue date Revisions content R_V0 2026-07-13 Original Report Number: BTF260709R00202 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 3 of 9 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdon g, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Table of Contents 1 Introduction ............................................................................................................................................................... 4 1.1 Laboratory Location .......................................................................................................................................... 4 1.2 Laboratory Facility ............................................................................................................................................ 4 1.3 Announcement ................................................................................................................................................. 4 2 Product Information ................................................................................................................................................. 5 2.1 Application Information ..................................................................................................................................... 5 2.2 Manufacturer Information ................................................................................................................................. 5 2.3 Factory Information .......................................................................................................................................... 5 2.4 General Description of Equipment under Test (EUT) ...................................................................................... 5 2.5 Technical Information ....................................................................................................................................... 5 3 RF Output Power ...................................................................................................................................................... 6 4 Applied Reference Documents ............................................................................................................................... 7 5 RF Exposure Limit .................................................................................................................................................... 7 6 RF Exposure Assessment ....................................................................................................................................... 8 Report Number: BTF260709R00202 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 4 of 9 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdon g, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 1 Introduction 1.1 Laboratory Location Test location: BTF Testing Lab (Shenzhen) Co., Ltd. Address: Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Phone number: +86-0755-23146130 Fax number: +86-0755-23146130 1.2 Laboratory Facility The test facility is recognized, certified, or accredited by the following organizations: ⚫ FCC - Designation No.: CN1409 BTF Testing Lab (Shenzhen) Co., Ltd. has been accredited as a testing laboratory by FCC (Federal Communications Commission). The test firm Registration No. is 695374. ⚫ CNAS - Registration No.: CNAS L17568 BTF Testing Lab (Shenzhen) Co., Ltd. is accredited to ISO/IEC 17025:2017 General Requirements for the Competence of Testing and Calibration laboratories f…

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AntennaSpecification ITEM ANTSPEC ModelName433MANT Center Frequency HorizontalVertical 400MHz430MHz450MHz400MHz430MHz450MHz -20.53-19.34-17.51-18.67-18.93-18.09 MAX.Gain0.71dB Polarization HorizontalandVertical AzimuthBeam Pattern Omni-directional Impedance50Ohm AntennaLength50mm Manufacturer XiamenYongxiangyangIntelligentTechnologyCo.,Ltd. Address Room309,Hi-TechBuilding,No.3699Xiang'anNorthRoad,Xiang'anDistrict, XiamenCity AntennaPhoto&Length(mm) 40mm 30mm Horizontal:400MHz430MHz450MHz Vertical:400MHz430MHz450MHz

Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 31 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-0755-23146130 http://www.btf-lab.com Version: 1/00 RF Test Report For Applicant name: TANGCAI(HK)IMPORTI& EXPORTCO.,LIMITED. Address: Unit 127, Room 701, 7/F, Block B, New Mandarin Centre, 14 Science Museum Road, Tsim Sha Tsui, Hong Kong EUT name: OPT28-GP Brand name: N/A Model number: OPT28-GP FCC ID: 2BWYWOPT28-GP Issued By Company name: BTF Testing Lab (Shenzhen) Co., Ltd. Address: Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Report number: BTF260709R00201 Test standards: 47 CFR Part 15.231 Test conclusion: Pass Date of sample receipt: 2026-07-09 Test date: 2026-07-09 to 2026-07-13 Date of issue: 2026-07-13 Prepared by: Approved by: Zac.zhou/ Project engineer Ryan.CJ / EMC Manager Note: All the test results in this report only related to the testing samples. Which can be duplicated completely for the legal use with approval of applicant; it shall not be reproduced except in full without the written approval of BTF Testing Lab (Shenzhen) Co., Ltd., All the objections should be raised within thirty days from the date of issue. To validate the report, you can contact us. Report Number:BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 2 of 31 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-0755-23146130 http://www.btf-lab.com Version: 1/00 Revision History Version Issue Date Revisions Content R_V0 2026-07-13 Original Note: Once the revision has been made, then previous versions reports are invalid. Report Number:BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 3 of 31 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-0755-23146130 http://www.btf-lab.com Version: 1/00 Table of Contents 1 Introduction ......................................................................................................................................................... 4 1.1 Laboratory Location .................................................................................................................................... 4 1.2 Laboratory Facility ...................................................................................................................................... 4 1.3 Announcement............................................................................................................................................ 4 2 Product Information ........................................................................................................................................... 5 2.1 Application Information ............................................................................................................................... 5 2.2 Manufacturer Information ........................................................................................................................... 5 2.3 Factory Information .................................................................................................................................... 5 2.4 General Description of Equipment under Test (EUT) ................................................................................. 5 2.5 Technical Information.................................................................................................................................. 5 3 Summary of Test Results ................................................................................................................................... 6 3.1 Test Standards ............................................................................................................................................ 6 3.2 Uncertainty of Test ...................................................................................................................................... 6 3.3 Summary of Test Result ............................................................................................................................. 6 3.4 Additions to, deviations, or exclusions from the method ............................................................................ 6 4 Test Configuration .............................................................................................................................................. 7 4.1 Test Equipment List .................................................................................................................................... 7 4.2 Test Auxiliary Equipment ............................................................................................................................ 8 4.3 Test Modes ................................................................................................................................................. 8 4.4 Test Channel of EUT .................................................................................................................................. 8 5 Evaluation Results (Evaluation) ........................................................................................................................ 9 5.1 Antenna requirement .................................................................................................................................. 9 …

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FCC ID: 2BWYWOPT28-GP Report Number: BTF260709R00201 Total or partial reproduction of this document without permission of the Laboratory is not allowed. Page 1 of 1 BTF Testing Lab (Shenzhen) Co., Ltd. Plant 101, 201 and 301, Building 1, Block 2, Tantou Industrial Park, Tantou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China Email: [email protected] Tel: +86-755-23146130 http://www.btf-lab.com Version: 1/00 Appendix I Test Setup Photos Emissions in Non-restricted Frequency Bands(30 MHz–1 GHz) Emissions in Restricted Frequency Bands Emissions in Non-restricted Frequency Bands(Above 1 GHz)