2ASNS691Two Way Radio

RT56B FCC & RT656B CE User’s manual To the user: Thanks for purchasing our explosion-proof transceiver. We believe it will provide great convenience for your work and life. With novel design and stable performance, you will experience professional and humanized design from our explosion-proof transceiver. We believe that you will be satisfied with the quality and functions, and it will provide you with convenient, quick, reliable two way voice communication. Please read the manual carefully before using the product. CAUTION • Do not operate it in flammable, explosive or other. transceiver-forbidden places such as petrol station, gas station, hospital, airport etc. • Do not expose it to direct sunlight for a long time, do not place it near any heating devices. • Do not put it in extremely dusty, moist or splash place; do not place it on unstable surface. • If it emits smoke or strange odours, remove the battery from the product immediately and contact us or the local dealer. • Cannot be transmitted without antenna installed • Refer service to the well-trained professional technicians only. • The power supply of this transceiver is DC 7.4V, please BL56B 7.4V 1800mAh Li-ion Battery as configured. DO NOT repair or disassemble by yourself. DO NOT charge battery in explosion-proof locations. • This transceiver should be charged by configured adaptor. Do not use batteries other than those provided by supplier. • Do not expose it to direct sunlight for a long time, do not place it in environment near any heating devices with temperatures below -20 or above +40. • If it emits smoke or strange odours, remove the battery from the product immediately and contact us or the local dealer. • Cannot be transmitted without antenna installed, or the devices will be damaged. • Do not operate it and power off in flammable, explosive environment. • MAKE SURE transceiver antenna, earphone jack cover and battery cover are dry before attachment. Exposing the inside of the transceiver to water will result in serious damage to the transceiver. • Do not put the battery separately in the water or contact with wet material. Do not short circuit the battery. DO NOT ATTACH, REMOVE OR CHARGE THE BATTERY IN EXPLOSION-PROOF LOCATIONS. EU Importer: Germany Retevis Technology GmbH Address: Uetzenacker 29,38176 wendeburg For downloading further resources: Brochures, Software/Firmware, Manual etc, Pls contact your direct reseller first OR go to website retevis.com and check “support” in the each product link to download it. Menu Safety and Explosion-proof................................................... Unpacking and Checking Equipment................................... Preparation Work.................................................................... Charging the Battery.............................................................. Install/Remove Battery Pack................................................. Getting Acquainted................................................................ Basic Operation...................................................................... Main Function Operation....................................................... Specification........................................................................... Common Troubleshooting..................................................... Frequency table................................................................... DE(11- 20) FR(21- 30) IT(31- 40) ES(41- 50) RU(51- 60) 1 1 2 2 2 3 4 4 6 6 61 Safety and Explosion-proof The explosion-proof handheld transceiver meets GB3836.1-2010 "Explosive environment Part 1: General requirements for equipment", GB 3 8 3 6. 4 - 2 0 1 0 "Explosive environment Part 4: Equipment protected by intrinsically safe "i", GB12476. 1-2013 "Electrical equipment for flammable dust environment - Part 1: General requirements", GB12476.4-2010 "Electrical equipment for flammable dust environment - Part 4: Intrinsically safe "iD" standard, the explosion-proof mark is Ex ib IIB T4 Gb, which has passed the inspection and certification of the national explosion-proof product quality supervision and inspection center, and obtained the explosion-proof certificate, certificate No. CNEx19.2543X. The product is suitable for use in zones 1 and 2 containing II A-II B and T1-T4 explosive gas mixtures. The Explosion-proof handheld transceiver adopts a new optimized explosion-proof design. The battery adopts dual output current Limiting protection and short circuit protection. The whole structure Design is compact and reliable, with safe and reliable explosion-proof performance, and is the ideal professional communication Transceiver in hazardous gas working environment. Unpacking and Checking Equipment Supplied Accessories Please carefully unpack the product and check the main equipment and accessories listed in the following table. If any items are missing or have been damaged during shipment, please contact the dealer immediately. Level Temp-erature T1(450) T2(300) T3(200) T4(135) T5(100) T6(85) II A II B II C Methane, toluene, methy ester, Ethane, propane, styrene, Carbonmonoxide, ethylacetate, Acetica- cid, chlorobenzene, methyl acetate, ammonla Propylene,Propyene Clear, dimethyl ether,Hydrogen cyanide,City gas Butadiene,ring Ethoxye- thane,B Ene, furan Dimethyl ether, propylene Aldehyde, hydrogen sulfide Dibutyl ether, two Ether, ethyl methyl, Tetrafluoro- ethylene ethanol, ethanol,ethylbenzene,Propyl alcohol, propylene,butanol,Butane, butyl acetate,Amyl acetate, cyclopentane Pentane, pentanol, hexane,Hexanol, heptane, octane,Ethanol, turpentine, Naphtha, petroleum (including steam Oil),fuel oil,Pentanol tetrachloromethane Acetaldehyde, trimethylamine Ethyl nitrite Hydrogen, water gas Acetylene Carbon disulfide Ethyl nitrate Accessories Quantity Adaptor Manual Desktop Charger Explosion- proof Li-Pol Battery Belt Clip 1 1 1 1 1 Adaptor ExplosioBlet ManualDeskt 1 Preparation Work Charging the Battery 1.Well connect adaptor cable and des…

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ShenzhenRetevisTechnologyCo.,Ltd. 2.911(d)(5)(i)EquipmentTypeAttestationv1.2 Section2.911(d)(5)(i)Certification–EquipmentType Companyname:ShenzhenRetevisTechnologyCo.,Ltd. Address:7/F,13-C,ZhonghaixinScience&TechnologyPark,No.12Ganli6thRoad,JihuaStreet, LonggangDistrict,Shenzhen,China ProductName:TwoWayRadio FCCID:2ASNS691 Model(s):RT56B 2.911(d)(5)(i)EquipmentType We,[ShenzhenRetevisTechnologyCo.,Ltd.](“theapplicant”)certifythattheequipmentforwhich authorizationissoughtthroughcertificationisnot:  Prohibitedfromreceivinganequipmentauthorizationpursuantto§2.903;oftheFCCrules.  Identifiedasanequipmenttypeinthe“CoveredList” NOTE1 Yourssincerely, Name:DongfangShenDate:2026-09-07 TitleandCompanyname:Manager/ShenzhenRetevisTechnologyCo.,Ltd. NOTE1 “CoveredList”;istheListofEquipmentandServicesCoveredBySection2ofTheSecureNetworksAct,availableat https://www.fcc.gov/supplychain/coveredlist References; 1)986446D01CoveredEquipmentv01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2)FederalRegisterdocument2022-28263publishedon02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

ShenzhenRetevisTechnologyCo.,Ltd. 2.911(d)(5)(ii)ApplicantAttestationv1.2 Section2.911(d)(5)(ii)Certification–Applicant(CoveredList) Companyname:ShenzhenRetevisTechnologyCo.,Ltd. Address:7/F,13-C,ZhonghaixinScience&TechnologyPark,No.12Ganli6thRoad,JihuaStreet, LonggangDistrict,Shenzhen,China ProductName:TwoWayRadio FCCID:2ASNS691 Model(s):RT56B 2.911(d)(5)(ii)Applicantfiling We,[ShenzhenRetevisTechnologyCo.,Ltd.](“theapplicant”)certifythat,asofthedateofthe filingoftheapplication,theapplicantisnotidentified NOTE1 onthe“CoveredList” NOTE2 ,established pursuantto §1.50002ofthischapter,asanentityproducingcoveredcommunicationsequipment. Yourssincerely, Name:DongfangShenDate:2026-09-07 TitleandCompanyname:Manager/ShenzhenRetevisTechnologyCo.,Ltd. NOTE1 Deleteoptionnotapplicabletothisapplication. NOTE2 “CoveredList”;istheListofEquipmentandServicesCoveredBySection2ofTheSecureNetworksAct,availableat https://www.fcc.gov/supplychain/coveredlist References; 1)986446D01CoveredEquipmentv01 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=325672 2)FederalRegisterdocument2022-28263publishedon02/06/23 https://www.federalregister.gov/documents/2023/02/06/2022-28263/protecting-against-national-security-threats-to-the-com munications-supply-chain-through-the

FederalCommunicationsCommission AuthorizationandEvaluationDivision EquipmentAuthorizationBranch 7435OaklandMillsRoad Columbia,MD21046 9/7/2026 U.S. Agent Designation Shenzhen Retevis Technology Co., Ltd. acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID:2ASNS691 ) Name and company of U.S. agent: RETEVIS INC Physical U.S. address of agent: 1733 E BROOKPORT ST COVINA, CA 91724 United States FRN of U.S. agent: 0033657701 Email address of U.S. agent: [email protected] Telephone No: +1（626）3622594 RETEVIS INC acknowledges their obligation to accept service of process on behalf of Shenzhen Retevis Technology Co., Ltd. Shenzhen Retevis Technology Co., Ltd. with the FRN [0028298024 ] accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature [Name]DongfangShen [Title]Manager [Company]ShenzhenRetevisTechnologyCo.,Lt Signature [NameofU.S.agent]LIUYELI [TitleofU.S.agent]Director [CompanyofU.S.agent]RETEVISINC

Differencesdeclaration 2026-09-07 Companyname:ShenzhenRetevisTechnologyCo.,Ltd. Address:7/F,13-C,ZhonghaixinScience&TechnologyPark,No.12Ganli6thRoad,Jihua Street,LonggangDistrict,Shenzhen,China ProductName:TwoWayRadio FCCID:2ASNS691 Model:RT56B ListedModel:RT56 Towhomconcern: OurcompanyShenzhenRetevisTechnologyCo.,Ltd. Herebydeclares: Multi-modeldifferencesareasfollows: Mainmodel: Listedmodel: MainModelNo.:RT56B Schematic diagram PCBlayoutAppearanceModelnameOther SeriesModelNo.:RT56  ∆  Note: 1.Ifitisasame,markitas 2.Ifthereisadifference,markitas∆;Iftherearedifferencesotherthanmodelnamedifferences, pleasedescribethemindetail ModelNo.:Differencesdescribe Mainmodelno.:RT56BTheproductmodelRT56isthesamePCBlayout,electronicschematicand AntennawithRT56B,whichtestedinShenzhenHuatongweiInternational InspectionCo.,Ltd.,Thedifferenceliesinthemodelnameforcommercialuse. Seriesmodelno.:RT56 By:DongfangShen SignaturePrinted Title:Manager Onbehalfof:ShenzhenRetevisTechnologyCo.,Ltd.

ShenzhenRetevisTechnologyCo.,Ltd. LetterofAuthorization Company:ShenzhenRetevisTechnologyCo.,Ltd. Address:7/F,13-C,ZhonghaixinScience&TechnologyPark,No.12Ganli6th Road,JihuaStreet,LonggangDistrict,Shenzhen,China ProductName:TwoWayRadio ModelNumber:RT56B FCCIdentifier:2ASNS691 WeauthorizeMiCOMLabsInc,575BoulderCourt,Pleasanton,California94566,USA, toactonourbehalfonallmattersconcerningtheabovenamedequipment. AnyindividualwithinMiCOMLabsisauthorizedtoactonourbehalfandtakeactionon theapplication. WedeclarethatMiCOMLabsInc,575BoulderCourt,Pleasanton,California94566, USA,isallowedtoforwardallinformationrelatedtotheapprovalprojecttotheFederal CommunicationCommissionandtodiscussanyissuesconcerningtheapproval application.AnyandallactscarriedoutbyMiCOMLabsonourbehalfshallhavethe sameeffectasactsofourown. Name:DongfangShenDate:2026-09-07 Title:Manager

ShenzhenRetevisTechnologyCo.,Ltd. OfficeofEngineeringTechnology FederalCommunicationsCommission 7435OaklandMillsRoad Columbia,MD21046 USA Date:2026-09-07 Subject;RequestforConfidentiality FCCID:2ASNS691 ToWhomItMayConcern, PursuanttotheprovisionsoftheCommission’srulesTitle47Sections§0.457and§0.459,we arerequestingtheCommissiontowithholdthefollowingattachment(s)asconfidential documentsfrompublicdisclosureindefinitely. Thesedocumentscontaindetailedsystemandequipmentdescriptionsandareconsideredas proprietaryinformationinoperationoftheequipment.Thepublicdisclosureofthesedocuments mightbeharmfultoourcompanyandwouldgivecompetitorsanunfairadvantageinthemarket. SchematicDiagram BlockDiagram PartsList OperationalDescription Tune-upProcedure Itisourunderstandingthatallmeasurementtestreports,FCCIDlabelformatand correspondenceduringthecertificationreviewprocesscannotbegrantedasconfidential documentsandthisinformationwillbeavailableforpublicreviewoncethegrantofequipment authorizationisissued. Sincerely, Signature: Name:DongfangShen Title:Manager

7.1. External Photos

7.2. Internal Photos

TEST REPORT For SAR Report No......................................... : CHTW26085070 Project No ........................................ : SHT2607078103W FCC ID ............................................. : 2ASNS691 Applicant’s name ............................. : Shenzhen Retevis Technology Co., Ltd. Address ............................................ : 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Product Name .................................. : Two Way Radio Trade Mark....................................... : RETEVIS Model No.......................................... : RT56B Listed Model(s) ................................ : RT56 Standard .......................................... : FCC 47 CFR Part2.1093 ANSI/IEEE Std C95.1-1992 IEEE Std 1528-2013 Date of receipt of test sample..........: 2026/7/23 Date of testing.............................: 2026/8/19 Date of issue...............................: 2026/8/28 Result ................... ........................: PASS Compiled by (Position+Printed name+Signature) : File administrator Caspar Chen Supervised by (Position+Printed name+Signature) : Project Engineer Xiaodong Zhao Approved by (Position+Printed name+Signature) : RF Manager Xu Yang Testing Laboratory Name ............. : Shenzhen Huatongwei International Inspection Co., Ltd. Address ............................................ : Building 7, Baiwang Idea Factory, No.1051, Songbai Road, Yangguang Community, Xili Subdistrict, Nanshan District, Shenzhen, Guangdong, China Test Report Form No. ........................ : R0066 Test Report Form(s) Originator.......... : Shenzhen Huatongwei International Inspection Co., Ltd. Master TRF ........................................ : Dated 2025-07 Shenzhen Huatongwei International Inspection Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Huatongwei International Inspection Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Huatongwei International Inspection Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context.The test report merely correspond to the test sample.The authenticity of this Test Report and its contents can be verified by contacting the Laboratory, responsible for this Test Report. Report No.: CHTW26085070 Page 2 of 26 Contents 1. Statement of Compliance 3 2. Test Standards and Report version 4 2.1. Test Standards 4 2.2. Report version 4 3. Summary 5 3.1. Client Information 5 3.2. Product Description 5 3.3. Radio Specification Description 5 3.4. Test frequency list 6 3.5. Testing Laboratory Information 6 3.6. Environmental conditions 6 4. Equipments Used during the Test 7 5. Measurement Uncertainty 8 6. SAR Measurements System Configuration 9 6.1. SAR Measurement Set-up 9 6.2. DASY5 E-field Probe System 10 6.3. Phantoms 11 6.4. Device Holder 11 7. SAR Test Procedure 12 7.1. Scanning Procedure 12 7.2. Data Storage and Evaluation 14 8. Position of the wireless device in relation to the phantom 16 8.1. Front-of-face 16 8.2. Body Position 16 9. Dielectric Property Measurements & System Check 17 9.1. Tissue Dielectric Parameters 17 9.2. SAR System Validation 18 9.3. System Check 18 10. SAR Exposure Limits 21 11. Antenna Location 22 12. Radiated Power Measurement Results and Tune-up 23 13. SAR Measurement Results 24 14. Test Setup Photos 25 15. External Photos of the EUT 26 Report No.: CHTW26085070 Page 3 of 26 1. Statement of Compliance Maximum Reported SAR (W/kg @1g) RF Exposure Conditions FRS Front-of-face(Dist.= 25mm) 0.234 Body-worn(Dist.= 0mm) 0.411 Note: 1. This device is in compliance with Specific Absorption Rate (SAR) for general population/uncontrolled exposure limits specified in FCC 47 CFR part 2 (2.1093) and IEEE Std C95.1. 2. This device had been tested in accordance with the measurement methods and procedures specified in IEEE 1528 and FCC KDB publications. 3. The above SAR values are all based on a 75% duty cycle. Report No.: CHTW26085070 Page 4 of 26 2. Test Standards and Report version 2.1. Test Standards The tests were performed according to following standards: FCC 47 Part 2.1093: Radiofrequency Radiation Exposure Evaluation:Portable Devices ANSI/IEEE C95.1-1992: IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz IEEE Std 1528-2013: IEEE Recommended Practice for Determining the Peak Spatial-Average Specific Absorption Rate (SAR) in the Human Head from Wireless Communications Devices: Measurement Techniques. FCC published RF exposure KDB procedures: KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz v01r04: SAR Measurement Requirements for 100 MHz to 6 GHz KDB 865664 D02 RF Exposure Reporting v01r02: RF Exposure Compliance Reporting and Documentation Considerations KDB 447498 D04 Interim General RF Exposure Guidance v01: Mobile and Portable Device RF Exposure Procedures and Equipment Authorization Policies TCB workshop: April, 2019; Page 19, Tissue Simulating Liquids (TSL) 2.2. Report version Revision No. Date of issue Description N/A 2026-08-28 Original Report No.: CHTW26085070 Page 5 of 26 3. Summary 3.1. Client Information Applicant: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Manufacturer: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China 3.2. Product Description Main unit Name of EUT: Two Way Radio Trade Mark: RETEVIS Model No.: RT56B Listed Model(s): RT56 Power supply: DC 7.4V from battery Hardware version: 6PD7-5871-HMC Software version: M-5871HM-C210816 Device Dimension: Length x Width…

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Appendix Report Project No. SHT2607078103W Test sample No. YPHT26070781003 Model No. RT56B Start test date 2026/8/19 Finish date 2026/8/19 Temperature 23.7°C Humidity 56% Test EngineerAuditor Appendix clause Test ItemResult AERP Measurement ResultsPASS BSAR Measurement ResultsPASS Appendix:1 of 3 Project No.:SHT2607078103W Appendix A:ERP Measurement Results Power Mode Channel Separation Frequency ERP (dBm) Tune up limit (dBm) ChannelMHz Analog12.5kHz CH4462.6375 31.63 32.00 CH11467.6375 26.98 27.50 Appendix A: 2/3 Project No.:SHT2607078103W Appendix B:SAR Measurement Results Front-of-face Mode Channel Separati on Test Position Test Distance (mm) Frequency ERP (dBm) Tune up limit (dBm) Tune up scaling factor Power Drift(dB) Measure d SAR(1g) Report SAR(1g) 75% Duty SAR(1g)Plot No. CHMHz(W/kg)(W/kg)(W/kg) Analog12.5kHzFront25 CH4462.6375 31.63 32.00 1.089 -0.05 0.286 0.311 0.234 1 CH11467.6375 26.98 27.50 1.127 -0.08 0.190 0.214 0.161 - Body-worn Mode Channel Separati on Test Position Test Distance (mm) Frequency ERP (dBm) Tune up limit (dBm) Tune up scaling factor Power Drift(dB) Measure d SAR(1g) Report SAR(1g) 75% Duty SAR(1g) Plot No. CHMHz(W/kg)(W/kg)(W/kg) Analog12.5kHz Back (With Belt Clip) 0 CH4462.6375 31.63 32.00 1.089 -0.08 0.503 0.548 0.411 2 CH11467.6375 26.98 27.50 1.127 -0.03 0.331 0.373 0.280 - Appendix B: 3/3 Test Laboratory: Huatongwei International Inspection Co., Ltd.,SAR LabDate: 2026/8/19 Analog-12.5kHz Front-of-face Communication System: UID 0, Analog (0); Frequency: 462.637 MHz;Duty Cycle: 1:1 Medium parameters used: f = 463 MHz; σ = 0.832 S/m; ε r = 41.711; ρ = 1000 kg/m 3 Phantom section: Flat Section Ambient Temperature:23.7°C;Liquid Temperature:22.4°C; DASY Configuration: lProbe: EX3DV4 - SN7494; ConvF(11.51, 11.51, 11.51) @ 462.637 MHz; Calibrated: 2025/11/ 27 lSensor-Surface: 1.4mm (Mechanical Surface Detection) lE lectronics: DAE4 Sn1549; Calibrated: 2026/5/ 8 lPhantom: ELI V8.0 ; Type: QD OVA 004 AA ; Serial: 2078 lDASY52 52.10.4(1535); SEMCAD X 14.6.14(7501) Front 25mm/CH4/Area Scan (7x21x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (measured) = 0.384 W/kg Front 25mm/CH4/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 21.90 V/m; Power Drift = -0.05 dB Peak SAR (extrapolated) = 0.433 W/kg SAR(1 g) = 0.286 W/kg; SAR(10 g) = 0.207 W/kg Smallest distance from peaks to all points 3 dB below: Larger than measurement grid (> 16 mm) Ratio of SAR at M2 to SAR at M1 = 66.6% Maximum value of SAR (measured) = 0.374 W/kg 0 dB = 0.374 W/kg = -4.27 dBW/kg Appendix D: SAR Test Data Plots Plot No.1 Test Laboratory: Huatongwei International Inspection Co., Ltd.,SAR LabDate: 2026/8/19 Analog-12.5kHz Body-worn Communication System: UID 0, Analog (0); Frequency: 462.637 MHz;Duty Cycle: 1:1 Medium parameters used: f = 463 MHz; σ = 0.832 S/m; ε r = 41.711; ρ = 1000 kg/m 3 Phantom section: Flat Section Ambient Temperature:23.7°C;Liquid Temperature:22.4°C; DASY Configuration: lProbe: EX3DV4 - SN7494; ConvF(11.51, 11.51, 11.51) @ 462.637 MHz; Calibrated: 2025/11/ 27 lSensor-Surface: 1.4mm (Mechanical Surface Detection) lE lectronics: DAE4 Sn1549; Calibrated: 2026/5/ 8 lPhantom: ELI V8.0 ; Type: QD OVA 004 AA ; Serial: 2078 lDASY52 52.10.4(1535); SEMCAD X 14.6.14(7501) Back(With Belt Clip) 0mm/CH4/Area Scan (7x21x1): Measurement grid: dx=15mm, dy=15mm Maximum value of SAR (measured) = 0.698 W/kg Back(With Belt Clip) 0mm/CH4/Zoom Scan (5x5x7)/Cube 0: Measurement grid: dx=8mm, dy=8mm, dz=5mm Reference Value = 29.36 V/m; Power Drift = -0.08 dB Peak SAR (extrapolated) = 0.758 W/kg SAR(1 g) = 0.503 W/kg; SAR(10 g) = 0.358 W/kg Smallest distance from peaks to all points 3 dB below: Larger than measurement grid (> 16 mm) Ratio of SAR at M2 to SAR at M1 = 66.2% Maximum value of SAR (measured) = 0.659 W/kg 0 dB = 0.659 W/kg = -1.81 dBW/kg Appendix D: SAR Test Data Plots Plot No.2 Appendix E: DAE and Probe Calibration Certificate 1 of 12 1.1. DAE4 Calibration Certificate Appendix E: DAE and Probe Calibration Certificate 2 of 12 Appendix E: DAE and Probe Calibration Certificate 3 of 12 Appendix E: DAE and Probe Calibration Certificate 4 of 12 1.2. Probe Calibration Certificate Appendix E: DAE and Probe Calibration Certificate 5 of 12 Appendix E: DAE and Probe Calibration Certificate 6 of 12 Appendix E: DAE and Probe Calibration Certificate 7 of 12 Appendix E: DAE and Probe Calibration Certificate 8 of 12 Appendix E: DAE and Probe Calibration Certificate 9 of 12 Appendix E: DAE and Probe Calibration Certificate 10 of 12 Appendix E: DAE and Probe Calibration Certificate 11 of 12 Appendix E: DAE and Probe Calibration Certificate 12 of 12 Appendix F: Dipole Calibration Certificate 1 of 7 1.1. D450V3 Dipole Calibration Certificate Appendix F: Dipole Calibration Certificate 2 of 7 Appendix F: Dipole Calibration Certificate 3 of 7 Appendix F: Dipole Calibration Certificate 4 of 7 Appendix F: Dipole Calibration Certificate 5 of 7 Appendix F: Dipole Calibration Certificate 6 of 7 Appendix F: Dipole Calibration Certificate 7 of 7 Extended Dipole Calibrations Referring to KDB865664 D01, if dipoles are verified in return loss (<-20dB, within 20% of prior calibration), and in impedance (within 5 ohm of prior calibration), the annual calibration is not necessary and the calibration interval can be extended. Head-450 Date of measurement Return-loss (dB) Delta (%) Real Impedance (ohm) Delta (ohm) Imaginary impedance (ohm) Delta (ohm) 2024-01-24 -21.5 58.4 -3.50 2025-01-17 -22.3 3.72 56.3 2.1 -5.19 1.69 2026-01-13 -22.5 4.65 56.2 2.2 -4.96 1.46 The return loss is <-20dB, within 20% of prior calibration; the impedance is within 5ohm of prior calibration. Therefore the verification result should support extended calibration.

TEST REPORT For FCC Part15B Report No......................................... : CHTW26085072 Project No ........................................ : SHT2607078101W FCC ID ............................................. : 2ASNS691 Applicant’s name ............................. : Shenzhen Retevis Technology Co., Ltd. Address ............................................ : 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Product Name .................................. : Two Way Radio Trade Mark....................................... : RETEVIS Model No.......................................... : RT56B Listed Model(s) ................................ : RT56 Standard .......................................... : FCC CFR Title 47 Part 15 Subpart B Date of receipt of test sample..........: 2026/7/27 Date of testing.............................: 2026/8/3 - 2026/8/27 Date of issue...............................: 2026/8/27 Result ................... ........................: PASS Compiled by (Position+Printed name+Signature) : File administrator Xiaodong Zhao Supervised by (Position+Printed name+Signature) : Project Engineer Caspar Chen Approved by (Position+Printed name+Signature) : RF Manager Xu Yang Testing Laboratory Name ............. : Shenzhen Huatongwei International Inspection Co., Ltd. Address ............................................ : Building 7, Baiwang Idea Factory, No.1051, Songbai Road, Yangguang Community, Xili Subdistrict, Nanshan District, Shenzhen, Guangdong, China Test Report Form No. ........................ : R0066 Test Report Form(s) Originator ......... : Shenzhen Huatongwei International Inspection Co., Ltd. Master TRF ........................................ : Dated 2025-07 Shenzhen Huatongwei International Inspection Co., Ltd. All rights reserved. This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen Huatongwei International Inspection Co., Ltd. is acknowledged as copyright owner and source of the material. Shenzhen Huatongwei International Inspection Co., Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context.The test report merely correspond to the test sample.The authenticity of this Test Report and its contents can be verified by contacting the Laboratory, responsible for this Test Report. Report No.: CHTW26085072 Page 2 of 19 Contents 1. TEST STANDARDS AND REPORT VERSION ........................................... 3 1.1. Test Standards 3 1.2. Report version 3 2. TEST DESCRIPTION .................................................................... 4 3. SUMMARY ............................................................................... 5 3.1. Client Information 5 3.2. Product Description 5 3.3. Radio Specification Description 5 3.4. Testing Laboratory Information 6 4. TEST CONFIGURATION ................................................................. 7 4.1. EUT operation mode 7 4.2. Support unit used in test configuration 7 4.3. Environmental conditions 7 4.4. Statement of the measurement uncertainty 7 4.5. Equipments Used during the Test 8 5. TEST CONDITIONS AND RESULTS ..................................................... 9 5.1. Conducted Emissions 9 5.2. Radiated Emissions 11 5.3. Antenna conducted power for reciver 16 6. TEST SETUP PHOTOS OF THE EUT .................................................. 18 7. EXTERNAL AND INTERNAL PHOTOS OF THE EUT .................................. 19 Report No.: CHTW26085072 Page 3 of 19 1. TEST STANDARDS AND REPORT VERSION 1.1. Test Standards The tests were performed according to following standards: FCC CFR Title 47 Part 15 Subpart B - Unintentional Radiators ANSI C63.4: 2014 – American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40GHz 1.2. Report version Revision No. Date of issue Description N/A 2026-08-27 Original Report No.: CHTW26085072 Page 4 of 19 2. TEST DESCRIPTION Section Test Item Section in CFR 47 Result Test Engineer 5.1 Conducted Emissions 15.107(a) Pass Junxu Lin 5.2 Radiated Emissions 15.109(a) Pass Jiachuo Liang Junman Wang 5.3 Antenna conducted power for recevier 15.111 Pass Caspar Chen Note: 1. The measurement uncertainty is not included in the test result. Report No.: CHTW26085072 Page 5 of 19 3. SUMMARY 3.1. Client Information Applicant: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China Manufacturer: Shenzhen Retevis Technology Co., Ltd. Address: 7/F, 13-C, Zhonghaixin Science&Technology Park, No.12 Ganli 6th Road, Jihua Street, Longgang District, Shenzhen, China 3.2. Product Description Main unit Product Name: Two Way Radio Trade Mark: RETEVIS Model No.: RT56B Listed Model…

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