2AQJJ7258Video Walkie Talkie

TCB CALL página 1 File FCC ID: 2AQJJ7258 Please upload an exhibit that explains how does the TCB verify the new agent information: 1- Is the address of the agent a valid physical US mailing address (not a US post office box, not a virtual mailbox, not P.O. Boxes, not a vacant lot, not a public building, etc.) ○ We have checked if the address exists in a real and potential building (Google maps) + official US register, after this verification and the evidence below we can guarantee the following: not a US post office box not a virtual mailbox not P.O. Boxes not a vacant lot not a public building(note) ► We checked the FCC FRN Search based on the information provided by the grantee. On the official register from : https://bizfileonline.sos.ca.gov/search/business TCB CALL página 2 TCB CALL página 3 TCB CALL página 4 In Google maps: TCB CALL página 5 ► CONCLUSION by TCB: The ASOP defined and provided by grantee is VALID and confirmed. Therefore the exhibit "C5266091_X23_Ed1_US_Agent_Letter" included in the file is ok. 2- Is the agent physically located at that valid US address such that the agent can be legally served at that address? Yes , check above 3- Has the listed agent clearly agreed in writing to serve as the agent for the grantee at that address? Yes, it is included in the exhibit "C5266091_X23_Ed1_US_Agent_Letter" >

Attestation Statement. Old Code: C5266091 24 New Code: 00015544 Ed.3 Change reason: FRN is added to the Applicant information section. 1/1 Shenzhen Jizhida Technology Co., Ltd TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 The Commission adopted rules that prohibit equipment authorization for “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List 1 , which is periodically updated. See the Covered List for more details. This Attestation Statement is to confirm that we follow the Section 2.911(d)(5)(i)-(ii) Applicant Company name: Shenzhen Jizhida Technology Co., Ltd Grantee code: 2AQJJ FCC ID: 2AQJJ7258 FRN: 0027669282 Contact Name: Jacky Cheung Address: 1902E., BLDG.C6, HENGFENG IND. CITY, NO.739, ZHOUSHI RD., HEZHOU COMMUNITY, BAOAN DIST., SHENZHEN, China Telephone No: +86 755 28702786 Fax No: / Email: [email protected] i. [Shenzhen Jizhida Technology Co., Ltd] (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. The applicant must sign this certification. ii. [Shenzhen Jizhida Technology Co., Ltd] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] (as a specifically named entity or any of its subsidiaries or affiliates) identified on the Covered List as an entity producing “covered” equipment. The applicant must sign this certification. [Shenzhen Jizhida Technology Co., Ltd] (“the applicant”) certifies that, as of the date of the filing of the application, the applicant [is not] identified on the Covered List as an entity producing “covered” equipment . Date: August 26, 2026 Applicant’s Name: Jacky Cheung Title: R&D Manager Signature 1 The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist

Shenzhen Jizhida Technology Co., Ltd Code 00018768 Ed. 1 Item 1. The device is able to install software/program installation? ☐ Yes, go to Item 2. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky cybersecurity or anti-virus software. Item 2. Technical Requirements for Kaspersky Cybersecurity Software: # General Requirements (For all Devices) Yes / No or N/A Comments 1 Internet connection for activation and updates (For all Operating Systems) N/A # General Requirements (For Windows Devices) Yes / No or N/A Comments 1 Storage: 1500 MB free space on the hard drive N/A Device Video Walkie Talkie Company name Shenzhen Jizhida Technology Co., Ltd Grantee code 2AQJJ FCC ID 2AQJJ7258 FRN 0027669282 Contact name Jacky Cheung Address 1902E., BLDG.C6, HENGFENG IND. CITY, NO.739, ZHOUSHI RD., HEZHOU COMMUNITY, BAOAN DIST., SHENZHEN, China Telephone number +86 755 28702786 E-mail [email protected] Chipset/module information BK7258QN6855 Operating System (if applicable) N/A Storage Capacity (hard drive or other permanent memory storage, if applicable) N/A 2 2 Operating System: Microsoft Windows 8, 8.1, 10 & 11 Home / Pro / Enterprise Microsoft Windows 7 Starter / Home Basic & Premium / Professional / Ultimate SP1 or higher N/A 3 Processor: 1 GHz or higher (x86 or x64) N/A 4 Memory (RAM)1 GB (32-bit) or 2 GB (64-bit) N/A 5 Screen Resolution: Minimum resolution of 1024 x 768 N/A # General Requirements (For macOS devices) Yes / No or N/A Comments 1 Operating System macOS® 13 – 14 N/A 2 Memory (RAM)4 GB N/A 3 Storage: 3455 MB free space on the hard drive N/A # General Requirements (For Android Devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: Android™ 10 – 14 N/A 3 Screen Resolution: Minimum resolution of 320 x 480 N/A # General Requirements (for iOS devices) Yes / No or N/A Comments 1 Storage: 150 MB free space N/A 2 Operating System: iOS® 17 N/A # General Requirements (For Linux system) Yes / No or N/A Comments 1 Hard drive: 1 GB of free space N/A 2 CPU: Intel Pentium 1 GHz or higher N/A 3 3 RAM: 1 GB N/A 4 Minimum software requirements: AlmaLinux OS 8 or later; AlterOS 7.5 or later; Astra Linux Common Edition 2.12 or later; CentOS 6.7 or later; Debian GNU/Linux 10.0 or later; EulerOS 2.0 or later; Oracle Linux 7.3 or later ; Red Hat Enterprise Linux 6.7 or later ; Rocky Linux 8.5 or later ; SUSE Linux Enterprise Server 12.5 or later; Ubuntu 12.04 or later ; Uncom OS Home / Business / Education / Enterprise 2.2 or later; ALT Linux Workstaton / Workstation K / Server / Education 8 or later; ROSA Linux Workstation / Server 12 or later ; RED OS 7.3 and later ; N/A After reviewed the technical requirements, is the device capable of supporting the installation of Kaspersky software? ☐ Yes, go to Item 3. ☒ No. In this case, the rest of the items do not apply. The device cannot support installation of Kaspersky software Item 3. Connectivity Capabilities: # Physical Interface Purpose Justification 1 1 The justification field is used to justify why the software cannot be received through that interface. Check the annex for more indications. 4 1 # Wireless Interface Purpose Justification 1 1 After the review of this items, the device: ☒ Cannot support installation of any cybersecurity or anti-virus software on the covered list. ☐ Potentially can operate with any cybersecurity or anti-virus software on the covered list – additional third- party proof is provided to demonstrate compliance with requirements as of 2.911(d)5(i),(ii) – “Proof of Compliance with Covered List Software Requirements” of this document applies Signature: Name: Jacky Cheung Date: August 26, 2026

ShenzhenJizhidaTechnologyCo.,Ltd ProductSimilarityDeclaration Productname:VideoWalkieTalkie Modelname:EZTalk90,HKT7258 FCCID:2AQJJ7258 We(ShenzhenJizhidaTechnologyCo.,Ltd)herebystatethatallthe modelsareelectricalidenticalincludingthesamesoftwareparameter andhardwaredesign(i.e.,circuitdesign,PCBLayout,RF module/circuit,antennatype(s)andantennalocation,componentson PCB,etc.,),samemechanicalstructureanddesign(includingproduct enclosure,materials,etc.,),Formodelsdifferences: EZTalk90:Withtrademark“RETEVIS”; HKT7258:Withtrademark“JIZHIDA”. Signature: Name:JackyCheung Title:R&DManager 2026/8/26

C5266091_X10_Ed.2 1/1 ShenzhenJizhidaTechnologyCo.,Ltd OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 Date:2026-08-26 Subject:RequestforConfidentiality FCCID:2AQJJ7258 ToWhomItMayConcern, PursuanttotheprovisionsofSections0.457and0.459ofCommission'srules (47CFR0.457,0.459),wearerequestingtheCommissiontowithholdthefollowing attachment(s)asconfidentialdocumentfrompublicdisclosure. ExhibitsLong-Term Confidentiality Short-TermConfidentiality NOTE2 IDLabel/LocationNoNo AttestationStatementNoNo ExternalPhotosNo ☒ BlockDiagram ☒☐ Schematics ☒☐ TestReportNoNo TestSetupPhotosNo ☒ User’sManual ☐ NOTE 1 ☒ InternalPhotos ☐ NOTE 1 ☒ PartsList/TuneUp ☐☐ RFExposureInfoNoNo OperationalDescription ☒☐ CoverLetter(s)NoNo SDRSoftware/SecurityInfo ☐ No NOTE1:Long-TermConfidentialitymaybepermittedunderspecialconditions(SeeII.LONG-TERMCONFIDENTIALITY,Section3of KDB726920,uselastinforce) NOTE2:Short-TermConfidentialitycanberequestedforamaximumof180daysfromthedateofthegrant. Abovementioneddocumentcontainsdetailedsystemandequipmentdescriptionare consideredasproprietaryinformationinoperationoftheequipment.Thepublic disclosureofabovedocumentsmightbeharmfultoourcompanyandwouldgive competitoranunfairadvantageinthemarket. Incaseofshort-termConfidentiality,theapplicantrequeststheexhibitsselectedabove arewithheldfrompublicviewforaperiodof___180___daysfromthedateofthe GrantofEquipmentAuthorizationandpriortomarketing. Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondentduringcertificationreviewprocesscannotbegrantedasconfidential documentsandthoseinformationwillbeavailableforpublicreviewoncethegrantof equipmentauthorizationisissued. C5266091_X10_Ed.2 1/1 Sincerely, Name:JackyCheung Title:R&DManager 2026/8/26

C5266091_X8_Ed.1 1/1 Letter of Authorization Shenzhen Jizhida Technology Co., Ltd Company: Shenzhen Jizhida Technology Co., Ltd Address: 1902E., BLDG.C6, HENGFENG IND. CITY, NO.739, ZHOUSHI RD., HEZHOU COMMUNITY, BAOAN DIST., SHENZHEN, China Product Name: Video Walkie Talkie Model Number: EZTalk 90, HKT7258 FCC Identifier: 2AQJJ7258 We authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, to act on our behalf on all matters concerning the above named equipment. Any individual within LGAI Technological Center S.A. is authorized to act on our behalf and take action on the application. We declare that authorize LGAI Technological Center S.A., Ronda de la Font del Carme, s/n, 08193 Bellaterra, Spain, is allowed to forward all information related to the approval project to the Federal Communication Commission and to discuss any issues concerning the approval application. Any and all acts carried out by LGAI Technological Center S.A. on our behalf shall have the same effect as acts of our own. Name: Jacky Cheung Date: August 26, 2026 Title: R&D Manager Signature of applicant:

LabelLocationOnEUT Confirmtheuseofrealappearancephotosasreferences

Page 1 of 35 FCC SAR Test Report Report No.:1812C60408412501 Applicant:Shenzhen Jizhida Technology Co., Ltd Address: 1902E, BLDG.C6, HENGFENG IND. CITY, NO.739, ZHOUSHI RD., HEZHOU COMMUNITY, BAOAN DIST, SHENZHEN, CHINA Product Name:Video Walkie Talkie Report Date:2026-09-02 Shenzhen Anbotek Compliance Laboratory Limited Note: This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, or any agency of the U.S. Government. This report contains data that are not covered by the NVLAP accreditation.The * items are not within the approved scope. #资质章# #检测章# Report No.:1812C60408412501 Page 2 of 35 FCC ID: 2AQJJ7258 Contents 1. Statement of Compliance .................................................................................................................5 2. General Information..........................................................................................................................6 2.1 Client Information................................................................................................................................................6 2.2 Description of Equipment Under Test (EUT) ......................................................................................................6 2.3 Device Category and SAR Limits .......................................................................................................................7 2.4 Applied Standard ................................................................................................................................................7 2.5 Environment of Test Site ....................................................................................................................................7 2.6 Test Configuration ..............................................................................................................................................7 2.7 Description of Test Facility..................................................................................................................................7 2.8 Disclaimer ...........................................................................................................................................................8 3. Specific Absorption Rate (SAR) .......................................................................................................9 3.1. Introduction ........................................................................................................................................................9 3.2. SAR Definition ...................................................................................................................................................9 4. SAR Measurement System ............................................................................................................10 4.1 E-Field Probe....................................................................................................................................................11 4.2 Data Acquisition Electronics (DAE) ..................................................................................................................11 4.3 Robot ................................................................................................................................................................12 4.4 Measurement Server ........................................................................................................................................13 4.5 Phantom ...........................................................................................................................................................14 4.6 Device Holder ...................................................................................................................................................15 4.7 Data Storage and Evaluation............................................................................................................................16 5. Test Equipment List........................................................................................................................18 6. Tissue Simulating Liquids...............................................................................................................19 7. System Verification Procedures .....................................................................................................22 8. EUT Testing Position......................................................................................................................24 8.1. Body Position...................................................................................................................................................24 9. Measurement Procedures ..............................................................................................................25 9.1. Power Reference Measurement ......................................................................................................................26 9.2. Area Scan Procedures ....................................................................................................................................26 9.3. Zoom Scan Procedures ...................................................................................................................................27 9.4. Volume Scan Procedures ................................................................................................................................28 10. Output Power ...............................................................................................................................29 11. Exposure Positions Consideration ...............................................................................................30 12. SAR Test Results Summary.........................................................................................................31 12.1. SAR Test Results ....…

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ReportNo.:1812C60408412501-02 FCCID:2AQJJ7258 AppendixB:PlotsofSARSystemCheck ReportNo.:1812C60408412501-02 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-02 FCCID:2AQJJ7258

ReportNo.:1812C60408412501-03 FCCID:2AQJJ7258 AppendixC:PlotsofSARtestData ReportNo.:1812C60408412501-03 FCCID:2AQJJ7258 #1

ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 AppendixD:DASYSystemCalibrationCertificate ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 1 、 DAE4-SN:387:DueDate(2026-10-12) ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 2 、 EX3DV4-SN:3959:DueDate(2026-10-08) ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 3 、 D2450V2-SN:1018:DueDate(2028-09-15) ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 4 、 D5GHzV2-SN:1093:DueDate(2028-09-16) ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258 ReportNo.:1812C60408412501-04 FCCID:2AQJJ7258

Page 1 of 31 FCC Test Report Report No.:1812C60408212501 Applicant:Shenzhen Jizhida Technology Co., Ltd Address: 1902E., BLDG.C6, HENGFENG IND. CITY, NO.739, ZHOUSHI RD., HEZHOU COMMUNITY, BAOAN DIST., SHENZHEN, CHINA Product Name:Video Walkie Talkie Report Date:2026-08-31 Shenzhen Anbotek Compliance Laboratory Limited Note: This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, or any agency of the U.S. Government. This report contains data that are not covered by the NVLAP accreditation.The * items are not within the approved scope. #检测章# #资质章# #报告二维码# Report No.:1812C60408212501Page 2 of 31 FCC ID: 2AQJJ7258 Contents 1. General Information ...............................................................................................................................6 1.1. Client Information ........................................................................................................................6 1.2. Description of Device (EUT) ........................................................................................................6 1.3. Auxiliary Equipment Used During Test........................................................................................7 1.4. Operation channel list..................................................................................................................7 1.5. Description of Test Mode(s) ........................................................................................................7 1.6. Measurement Uncertainty ...........................................................................................................7 1.7. Additional Instructions .................................................................................................................8 1.8. Test Summary .............................................................................................................................8 1.9. Description of Test Facility ..........................................................................................................9 1.10. Disclaimer..................................................................................................................................9 1.11. Test Equipment List.................................................................................................................10 2. Antenna requirement ...........................................................................................................................12 2.1. Conclusion.................................................................................................................................12 3. Conducted Emission at AC power line ................................................................................................13 3.1. EUT Operation ..........................................................................................................................13 3.2. Test Setup .................................................................................................................................13 3.3. Test Data ...................................................................................................................................13 4. 6dB Bandwidth ....................................................................................................................................14 4.1. EUT Operation ..........................................................................................................................14 4.2. Test Setup .................................................................................................................................14 4.3. Test Data ...................................................................................................................................14 5. Maximum Conducted Output Power....................................................................................................15 5.1. EUT Operation ..........................................................................................................................15 5.2. Test Setup .................................................................................................................................15 5.3. Test Data ...................................................................................................................................15 6. Power Spectral Density .......................................................................................................................16 6.1. EUT Operation ..........................................................................................................................16 6.2. Test Setup .................................................................................................................................16 6.3. Test Data ...................................................................................................................................16 7. Emissions in non-restricted frequency bands ......................................................................................17 7.1. EUT Operation ..........................................................................................................................17 7.2. Test Setup .................................................................................................................................17 7.3. Test Data ...................................................................................................................................17 8. Band edge emissions (Radiated) ........................................................................................................18 8.1. EUT Operation ..........................................................................................................................18 8.2. Test Setup .................................................................................................…

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ShenzhenGuangyuanfaElectronicsCo.,Ltd. Address:Floors1–2,Building2,NanfengchengIndustrialPark,ChuangyeRoad,ShilongzaiVillage,ShiyanTown,Bao'anDistrict Add:Building2,No.11,ChuangyanRoad,ShilongCommunity,ShiyanRoad,BaoanDistrict,ShenzhenTel: 0755-26702159Fax:0755-26702585Website:http://www.gyfgpsbd.com/ Documentnumber： SampleAcknowledgmentLetter SpecificationForApproval Customername： Customer: Jizhidá SupplierNa- me:Customer: ShenzhenGuangyuanfaElectronicsCo.,Ltd. SHENZHENGUANGYUANFAELECTRONICCO.,LTD CustomerPartNumber: SupplierPartNumber: GYF-2.4G-V1.0 Productdescription： 2.4GHzWi-FiCopper-WireAntenna Compatiblemodels: HKT7258 Supplieracknowledges(Seal):CustomerAcknowledgment(Seal): Producedby:ChenWeipeng Author:HuangWangchun Reviewedby:ChenWeiyuan Date:July11,2026 ShenzhenGuangyuanfaElectronicsCo.,Ltd. 2 / 8 Catalogue 1.Specifications 1.1ElectricalSpecifications 1.2AntennaFrequencyRange 2.Matchingcircuit diagram 3.structuralstyle 3.1AntennaComponents 4.testingfacility 5.VSWRTestConnection 5.1testconnection 6.test 6.1Testsite 6.2Testinstruments 6.3Antennapassivetest: Standingwaveratio;6.4 Antennaactivedata 7.DrawingSpecifications 7.1blueprint 7.2SampleDimension Measurement 7.3BillOfMaterial 8.reliabilitytest 8.1ReliabilityTestReport 8.2ProductStorageInstructions 9.workingtemperature 10.Physicalantenna image ShenzhenGuangyuanfaElectronicsCo.,Ltd. 3 / 8 1.Specifications 1.1ElectricalSpecifications ThisreportprimarilyprovidestestresultsforvariouselectricalandstructuralperformanceparametersoftheHKT7258antenna. 1.2AntennaFrequencyRange TheTableBelowListstheElectricalPerformanceSpecificationsforAntennasDesignedandMass-ProducedbyGuangyuanfa. 2.MatchingCircuitDiagram 3.StructuralStyle SpecificationsandmodelsGuangyuanMaterialCode WIFIantenna GYF-2.4G-V1.0 ShenzhenGuangyuanfaElectronicsCo.,Ltd. 4 / 8 3.1AntennaComponents Theantennaprimarilyconsistsofcoppertubingandcoaxialcable. 4.TestingFacility 5VSWRTestConnection 5.1→TestLine→ConnectionsetupforVSWRtesting:ThesequentialconnectionsequencefortheVSWRtestingequipmentisasfollows:lR&SZVLNetworkAnalyzerTestjig.I 6.Test 6.1TestSite:GuangyuanfaMicrowaveFaradayCage.TheTestFrequencyRangeIs400MHz–6GHz;theQuietZoneRadiusIs50Cm;andtheReflectivityIs[toBeSpecified]. Lessthan-50dB. 6.2TestInstruments:Agilent5071B,CMW500,Agilent8960E5515C,StandardHornAntenna,24-PointProbeOTAMicrowaveDarkChamber Roomtestingsystem,printer,etc. 6.32.4GAntennaPassiveTest:StandingWaveRatio ShenzhenGuangyuanfaElectronicsCo.,Ltd. 5 / 8 2500MHz ShenzhenGuangyuanfaElectronicsCo.,Ltd. 6 / 8 7.DrawingSpecifications 7.1Blueprint 7.2SampleDimensionMeasurement ProjectName HKT7258 FinishedProduct PartNumber GYF-2.4G-V1.0Date2026.6.23 Item Specifications ExperimentalDataJudgeRemarks 12345 1 56.15656.0256.0856.0456.06OK 2 24.524.524.524.524.524.5OK 3 4.44.44.44.44.44.4OK 4 1.131.131.131.131.131.13OK 5 ShenzhenGuangyuanfaElectronicsCo.,Ltd. 7 / 8 7.3BillOfMaterial BillOfMaterial ProjectName HKT7258 FinishedProductPart Number GYF-2.4G-V1.0Date2026.7.11 BillOfMaterial Class Materialquality SpecificationsDosage 1 2.4GCopperTubeAntenna Copper56*24.5*4.41 2CoaxialcableCopper 1.13Black,56mm,1stGenerationTerminal 1 3 8.ReliabilityTest 8.1ReliabilityTestReport ProjectName HKT7258 FinishedProductPart Number GYF-2.4G-V1.0Date2026.7.11 Testquantity15pcsStarttime June14,09:15 Finishtime June18,11:25AM TestitemTestingstandard Test Quantity TestresultRemarks Saltsprayco- rrosiontest （1）Testtemperature:Saltwatertest:35 °C±2 ° C;Pressurevesseltest:47 °C±1 °C （2）Experimentalconditions/methods:Saltwater concentration≥5%;solutionpH:6.5–7.2;air pressure: 1.0–1.2kg/m²;thetestdurationshallbeset accordingtotheproductspecifications. （3）Testcompletion:After2hours,observetheproduct surfaceforsignsofsurfaceoxidation,discoloration,or peelingofthecoating. 5pcsOK Testingtime 48H Low- temperaturetest （1）Temperature:-30°C(-25°C–pilot-scalestage) （2）Testduration:20hours/Packagingconditions: Unpackaged （3）Thetestsampleshallbeplacedinanextreme temperaturechamberwithoutbeingpoweredon;first, adjustthechambertemperatureto25°Candhumidityto 65%,andmaintaintheseconditionsfor1hour;then,cool thesampledownto-30°Cwithin1hourwhilemaintaining thehumidityat65%;aftermaintainingtheconditionsfor another20hours,raisethetemperaturebacktoambient temperatureover1hour;finally,performtheperformance testafter2hours. AppearanceandStructure:Theantenna'sexteriorsurfaceshallbe freeofdefects;theantennashallnotexhibitdeformation, warping,ordamage;itsperformanceshallbenormal;andits standingwaveratioshallnotexceed10%asspecifiedinthe productstandards. 5pcsOK Testingtime 20H High- TemperatureTest （1）Temperature:+70°C(+65°C–pilot-scalestage); Humidity:85%(80%–pilot-scalestage). （2）Testduration:20hours/Packagingconditi- ons:Notpackaged 5pcsOK ShenzhenGuangyuanfaElectronicsCo.,Ltd. 8 / 8 8.2ProductStorageInstructions 1.Theexposedpartsofthegold-platedcomponentsmustundergosurfaceplating(anti-rusttreatment),suchasgoldplating,OSPplating,ortin plating;thestorageenvironmentshouldbefreefromcorrosivegases. 2.Theantennatemperaturemustbemaintainedbetween21–38 °C,andthehumiditymustbecontrolledbetween50–70 %.Excessivelyhigh temperaturesmaycausethe3Madhesivetomelt,resultingindegradedadhesionpropertiesoftheantenna. 3.Itisrecommendedthatiftheinitialbondingtemperatureisbelow10°C,b…

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