2AKS8-DX-BT26Bluetooth Module

DX-BT26&DX-BT28 SERIALUARTAPPLICATIONGUIDE Version：1.2 Date：2022-10-11 DX-BT26&BT28 SERIALUARTAPPLICATIONGUIDE -2- UpdateRecord VersionDateIllustrateAuthor V1.12022/6/1initialversionDL V1.22022/10/11 ModifytheATcommandtosetthelow-power modecannotrepeatthesettingproblem DL ContactUs ShenzhenDX-SMARTTechnologyCo.,Ltd. Email：[email protected] Tel：0755-29978125 Web：www.szdx-smart.com Add：Room601,BlockA1,HuafengZhigu,HangkongRoad,BaoanDistrict,Shenzhen DX-BT26&DX-BT28 SERIALUARTAPPLICATIONGUIDE ShenzhenDX-SMARTTechnologyCo.,Ltd.www.szdx-smart.com -3- Contents 1.Introduction......................................................................................................................................................-5- 1.1.SerialPortBasicParameters..............................................................................................................-5- 1.2.ATCommandAndTransparentTransmissionMode.................................................................-5- 1.3.Modulecompositionnetworkdatatransmission........................................................................-5- 1.4.ModuleDataThroughput...................................................................................................................-6- 2. MobilePhoneTestingAPPAndPC-sideTools.......................................................................................-8- 2.1.AndroidTestAPP..................................................................................................................................-8- 2.2.AppleTestApp......................................................................................................................................-9- 2.3.ComputerTestSoftware...................................................................................................................-10- 3.SerialPortUsage...........................................................................................................................................-10- 3.1.UseSerialPortToReadAndWriteATCommands...................................................................-10- 3.1.1.ModuleTestMinimalSystem...............................................................................................-10- 3.1.2.TheProcessOfReadingAndWritingATCommandsOntheComputer...............-11- 3.1.3.MCUReadAndWriteATCommandProcess..................................................................-12- 3.2.UseSerialCommunication...............................................................................................................-13- 3.2.1.UseThePCToCommunicateWithTheModule............................................................-13- 3.2.2.CommunicateWithTheModuleUsingTheMobileTerminal....................................-14- 3.2.3.CommunicateWithTheModuleUsingMasterBluetooth..........................................-15- 4.DetailedExplanationOfRelatedATCommands.................................................................................-16- 4.1.CommandFormatDescription........................................................................................................-16- 4.2.IndicacionFormat...............................................................................................................................-16- 4.3.ExamplesOfATCommands.............................................................................................................-17- 5. ATCommand..................................................................................................................................................-17- 5.1.BasicCommands.................................................................................................................................-17- 5.1.1.TestCommand.........................................................................................................................-17- 5.1.2.ReadFirmwareVersion..........................................................................................................-17- 5.1.3.ReadMACAddress.................................................................................................................-17- 5.1.4.Read/WriteLocalName.........................................................................................................-18- 5.1.5.Set\Query—BluetoothDeviceName+MAC..................................................................-18- 5.1.6.Set/Query—Serial-portStopBit..........................................................................................-18- 5.1.7.Set/Query—Serial-portParityBit........................................................................................-19- 5.1.8.Set/Query—UARTBaudrate.................................................................................................-19- 5.1.9.Set/Query—SoftwareFlowControl....................................................................................-19- 5.1.10.Set/Query—TransparentTransmissionMode..............................................................-20- 5.1.11.DisconnectBluetooth...........................................................................................................-20- 5.1.12.Set/Query—BluetoothDeviceType.................................................................................-21- 5.1.13.SoftwareReset.......................................................................................................................-21- 5.1.14.RestoreFactorySettings.....................................................................................................-21- 5.1.15.ReadBasicModuleInformation.......................................................................................-21- DX-BT26&DX-BT28 SERIALUARTAPPLICATIONGUIDE ShenzhenDX-SMARTTechnologyCo.,Ltd.www.szdx-smart.com -4- 5.2.BroadcastPacketInstruction...........................................................................................................-22- 5.2.1.Set/Query—SERVICEUUID...........................................................…

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1/1 US Agent for Service of Process LETTER OF ATTESTATION TO: Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 US Agent for Service of Process: Company Name: JOC Australia Inc FRN: 0033379421 Contact Name: Benjamin.Smith/Vice President Address: 18351 Colima Road Ste 585 Rowland Heights,California,91748 United States of America Telephone No: +1(626) 217 4778 Email: [email protected]/[email protected] Applicant: Company name: SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Product Description: Bluetooth Module Grantee code: 2AKS8 FCC ID: 2AKS8-DX-BT26 Contact Name: Zhou guanzhi Address: Room 601, Block A1, HuafengZhigu, Hangkong Road, Baoan District, Shenzhen, China Telephone No: 13560766924 Email: [email protected] [SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD] certifies that, as of the date of this filing of the application with the TCB, [JOC Australia Inc] is our designated US agent for service of process for the above referenced FCC ID. [SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD] accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any commission related proceeding involving equipment. [JOC Australia Inc] accepts, as of the date of the filing of the application, the obligation of the designated US agent for service of process for the above reference FCC ID. The US Agent for Service of Process is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. The Applicant is aware of and agrees to comply with the requirements outlined in the FCC Equipment Authorization Program, Report and Order FCC 22-84, and clause § 2.911. Date: 2023/04/28 Applicant’s Name: SHEN ZHEN DX- SMART TECHNOLOGY CO.,LTD US Agent for Service of Process’s Name: JOC Australia Inc Title: Sales Manage Title: Vice President Signature Zhou guanzhi Signature Benjamin.Smith

C5266091_X24_Ed.1 1/1 “Attestation Statements” 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: SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Grantee code: 2AKS8 FCC ID: 2AKS8-DX-BT26 Contact Name: Zhou guanzhi Address: Room 601, Block A1, HuafengZhigu, Hangkong Road, Baoan District, Shenzhen, China Telephone No: 13560766924 Fax No: 0755-29978369 Email: [email protected] i. SHEN ZHEN DX-SMART 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. SHEN ZHEN DX-SMART 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. The applicant must sign this certification. Date: 2023/04/28 Applicant’s Name: Zhou guanzhi Title: Sales Manage 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

C5266091_X9_Ed.2 1/1 SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Modular Transmitter Approval Request Federal Communications Commission Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 Company name: SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD FCC ID: 2AKS8-DX-BT26 Gentlemen, In accordance with 47CFR 15.212 Modular Transmitters and KDB 996369 D01 ‘Module Certification Guide v02’. FCC ID 2AKS8-DX-BT26 has been examined against the following requirements. Items to be covered by Single modular transmitters. Requirement per 15.212 and KDB 996369 D01 ‘Modular Certification Guide v02 Explanation from Grantee (do not write yes/no, but explain why product complies/how it is achieved) 1. The radio elements must have the radio frequency circuitry shielded. Physical components and tuning capacitor(s) may be located external to the shield, but must be on the module assembly Yes, with shielded 2. The module must have buffered modulation/data inputs to ensure that the device will comply with Part 15 requirements with any type of input signal Yes , All inputs to the modules are buffered through logic or microprocessor inputs. 3. The module must contain power supply regulation on the module Yes, A low drop out regulator is used for modular power supply regulation. 4. The module must contain a permanently attached antenna, or contain a unique antenna connector, and be marketed and operated only with specific antenna(s), per Sections 15.203, 15.204(b), 15.204(c), 15.212(a), 2.929(b) Yes, Device is equipped with Integral antenna. 5. The module must demonstrate compliance in a stand- alone configuration Yes, distance between modular and all AEs are longer than 20cm ，refer to setup photo. 6. The module must be labelled with its permanently affixed FCC ID label, or use an electronic display (See KDB Publication 784748 about labelling requirements) Yes ,The modular has a permanent fixed label, and below statement was listed in the User Manual; The host device must be labeled to display the FCCID of the module Contains FCC ID: 2AKS8-DX-BT26 7. The module must comply with all specific rules applicable to the transmitter including all the conditions provided in the integration instructions by the grantee Yes ,The module comply with all specific rules applicable to the transmitter including all the conditions provided in the integration instructions by the grantee, Refer to test report and user manual 8. The module must comply with RF exposure requirements Yes , Transmitter meets MPE calculation of 47 CFR 1.1307 . Refer to MPE Reports and Refer to modular installation manual C5266091_X9_Ed.2 1/1 A limited modular approval (LMA) may be granted for single or split modular transmitters that comply partially with requirements above. Name: Zhou guanzhi Date: 2023.04.28 Title: Sales Manage Signature of applicant

Page 1 of 1 Report No.: STS2304018 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: DX-BT26 Photo 1 Photo 2 BLE Antenna

FCC Label W:10mm L:25mm Bluetooth Module Model name: DX-BT26 FCC ID: 2AKS8-DX-BT26

Page 1 of 1 Report No.: STS2304018 APPENDIX-PHOTOGRAPHS OF EUT CONSTRUCTIONAL DETAILS Model: DX-BT26 Photo 1

Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from STS, all test data presented in this report is only applicable to presented test sample. Shenzhen STS Test Services Co., Ltd. A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China TEL: +86-755 3688 6288 FAX: +86-755 3688 6277 E-mail:[email protected] RADIO TEST REPORT Report No: STS2304018H02 Issued for SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Room 601, Block A1, HuafengZhigu, Hangkong Road, Baoan District, Shenzhen, China Product Name: Bluetooth Module Brand: N/A Model Number: DX-BT26 Series Model(s): N/A FCC ID: 2AKS8-DX-BT26 Test Standard: FCC 47CFR §2.1091 S T L A B S Page 2 of 9 Report No.: STS2304018H02 Test Report Certification Applicant’s Name ................. : SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Address ................................. : Room 601, Block A1, HuafengZhigu, Hangkong Road, Baoan District, Shenzhen, China Manufacturer's Name .......... : SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Address ................................. : Room 601, Block A1, HuafengZhigu, Hangkong Road, Baoan District, Shenzhen, China Product Description Product Name ........................ : Bluetooth Module Brand ................................... : N/A Model Number ....................... : ... : DX-BT26 Series Model(s) ...................... : N/A Standards ............................. : FCC 47CFR §2.1091 447498 D04 Interim General RF Exposure Guidance v01 This report shall not be reproduced except in full, without the written approval of STS, this document only be altered or revised by STS, personal only, and shall be noted in the revision of the document. Date of Test ............................................ : Date of receipt of test item ...................... : 10 Apr. 2023 Date (s) of performance of tests ............. : 10 Apr. 2023 ~ 12 Apr. 2023 Date of Issue ........................................... : 12 Apr. 2023 Test Result ............................................... : Pass Testing Engineer : (Chris Chen) Technical Manager : (Sean she) Authorized Signatory : (Bovey Yang) Page 3 of 9 Report No.: STS2304018H02 TABLE OF CONTENTS 1. GENERAL INFORMATION 5 1.1 GENERAL DESCRIPTION OF THE EUT 5 1.2 TEST FACTORY 5 2. FCC 47CFR §2.1091 REQUIREMENT 6 2.1 TEST STANDARDS 6 2.2 LIMIT 6 2.3 TEST RESULT 9 Page 4 of 9 Report No.: STS2304018H02 Revision History Rev. Issue Date Report No. Effect Page Contents 00 12 Apr. 2023 STS2304018H02 ALL Initial Issue Page 5 of 9 Report No.: STS2304018H02 1. GENERAL INFORMATION 1.1 GENERAL DESCRIPTION OF THE EUT Product Name Bluetooth Module Brand N/A Model Number DX-BT26 Series Model(s) N/A Model Difference N/A Product Description The EUT is Bluetooth Module Operation Frequency: 2402~2480 MHz Modulation Type: GFSK Antenna gain: 0.37dBi Antenna Designation: PCB Antenna Rating Input: DC 3.3V Hardware Version V 1.0.0 Software Version V 1.0.3 1.2 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 Page 6 of 9 Report No.: STS2304018H02 2. FCC 47CFR §2.1091 REQUIREMENT 2.1 TEST STANDARDS Follow the maximum permissible exposure (MPE) limits specified in 447498 D04 Interim General Radio Frequency Exposure Guidelines v01. The gain of the antenna used in the product was extracted from the supplied antenna data sheet and the maximum total power input to the antenna was also measured. Calculate the distance from the product to the MPE limit by the formula. 2.2 LIMIT For single RF sources (i.e., any single fixed RF source, mobile device, or portable device, as defined in paragraph (b)(2) of this section): A single RF source is exempt if: (A) The available maximum time-averaged power is no more than 1 mW, regardless of separation distance. This exemption may not be used in conjunction with other exemption criteria other than those in paragraph (b)(3)(ii)(A) of Part 1.1307. Medical implant devices may only use this exemption and that in paragraph (b)(3)(ii)(A); (B) Or the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold Pth (mW) described in the following formula. This method shall only be used at separation distances (cm) from 0.5 centimeters to 40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). Pth is given by: Page 7 of 9 Report No.: STS2304018H02 (C) Or using below table and the minimum separation distance (R in meters) from the body of a nearby person for the frequency (f in MHz) at which the source operates, the ERP (watts) is no more than the calculated value prescribed for that frequency. For the exemption in Table 1 to apply, R must be at least λ/2π, where λ is the free-space operating wavelength in meters. If the ERP of a single RF source is not easily obtained, then the available maximum time-averaged power may be used in lieu of ERP if the physical dimensions of the radiating structure(s) do not exceed the electrical length of λ/4 or if the antenna gain is less than that of a half-wave dipole (1.64 linear value). RF Source frequency (MHz) Threshold ERP(watts) 0.3-1.34 1,920 R 2 . 1.34-30 3,450 R 2 /f 2 . 30-300 3.83 R 2 . 300-1,500 0.0128 R 2 f. 1,500-100,000 19.2R 2 . Page 8 of 9 Report No.: STS2304018H02 For multiple RF sources: Multiple RF sources are exempt if: (A) The available maximum time-averaged power of each source is no more than 1 mW and there is a separation distance of two centimeters between any portion of a radiating structure operating and the nearest portion of any other radiating structure in the same device, except if the sum of multiple sources is less than 1 mW during t…

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Manufacturers: Shenzhen Red Heart Electronic Technology Co., LTD Model Name: DX-BT26 10mm 2mm

Any reproduction of this document must be done in full. No single part of this document may be reproduced without permission from STS, all test data presented in this report is only applicable to presented test sample. Shenzhen STS Test Services Co., Ltd. A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China TEL: +86-755 3688 6288 FAX: +86-755 3688 6277 E-mail:[email protected] RADIO TEST REPORT Report No.:STS2304018W02 Issued for SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Room 601, Block A1, HuafengZhigu, Hangkong Road, Baoan District, Shenzhen, China Product Name: Bluetooth Module Brand: N/A Model Number: DX-BT26 Series Model(s): N/A FCC ID: 2AKS8-DX-BT26 Test Standard: FCC Part 15.247 S T L A B S Page 2 of 58 Report No.: STS2304018W02 TEST RESULT CERTIFICATION Applicant’s Name ..................: SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Address ..................................: Room 601, Block A1, HuafengZhigu, Hangkong Road, Baoan District, Shenzhen, China Manufacturer's Name ...........: SHEN ZHEN DX-SMART TECHNOLOGY CO.,LTD Address ..................................: Room 601, Block A1, HuafengZhigu, Hangkong Road, Baoan District, Shenzhen, China Product Description Product Name .........................: Bluetooth Module Brand ....................................: N/A Model Number ........................:... : DX-BT26 Series Model(s) ......................: N/A Test Standards ......................: FCC Part15.247 Test Procedure .......................: ANSI C63.10-2013 This device described above has been tested by STS, the test results show that the equipment under test (EUT) is in compliance with the FCC requirements. And it is applicable only to the tested sample identified in the report. This report shall not be reproduced except in full, without the written approval of STS, this document may be altered or revised by STS, personal only, and shall be noted in the revision of the document. Date of Test ............................................ : Date of receipt of test item ...................... : 10 Apr. 2023 Date (s) of performance of tests ............. : 10 Apr. 2023 ~ 12 Apr. 2023 Date of Issue ........................................... : 12 Apr. 2023 Test Result ............................................... : Pass Testing Engineer : (Chris Chen) Technical Manager : (Sean she) Authorized Signatory : (Bovey Yang) Page 3 of 58 Report No.: STS2304018W02 Table of Contents 1. SUMMARY OF TEST RESULTS 6 1.1 TEST FACTORY 7 1.2 MEASUREMENT UNCERTAINTY 7 2. GENERAL INFORMATION 8 2.1 GENERAL DESCRIPTION OF THE EUT 8 2.2 DESCRIPTION OF THE TEST MODES 10 2.3 TEST SOFTWARE AND POWER LEVEL 10 2.4 BLOCK DIAGRAM SHOWING THE CONFIGURATION OF SYSTEM TESTED 11 2.5 DESCRIPTION OF NECESSARY ACCESSORIES AND SUPPORT UNITS 12 2.6 EQUIPMENTS LIST 13 3. EMC EMISSION TEST 14 3.1 CONDUCTED EMISSION MEASUREMENT 14 3.2 TEST PROCEDURE 15 3.3 TEST SETUP 15 3.4 EUT OPERATING CONDITIONS 15 3.5 TEST RESULTS 16 4. RADIATED EMISSION MEASUREMENT 18 4.1 RADIATED EMISSION LIMITS 18 4.2 TEST PROCEDURE 20 4.3 TEST SETUP 21 4.4 EUT OPERATING CONDITIONS 21 4.5 FIELD STRENGTH CALCULATION 22 4.6 TEST RESULTS 23 5. CONDUCTED SPURIOUS & BAND EDGE EMISSION 30 5.1 LIMIT 30 5.2 TEST PROCEDURE 30 5.3 TEST SETUP 30 5.4 EUT OPERATION CONDITIONS 30 5.5 TEST RESULTS 30 6. POWER SPECTRAL DENSITY TEST 31 6.1 LIMIT 31 6.2 TEST PROCEDURE 31 6.3 TEST SETUP 31 Page 4 of 58 Report No.: STS2304018W02 Table of Contents 6.4 EUT OPERATION CONDITIONS 31 6.5 TEST RESULTS 31 7. BANDWIDTH TEST 32 7.1 LIMIT 32 7.2 TEST PROCEDURE 32 7.3 TEST SETUP 32 7.4 EUT OPERATION CONDITIONS 32 7.5 TEST RESULTS 32 8. PEAK OUTPUT POWER TEST 33 8.1 LIMIT 33 8.2 TEST PROCEDURE 33 8.3 TEST SETUP 34 8.4 EUT OPERATION CONDITIONS 34 8.5 TEST RESULTS 34 9. ANTENNA REQUIREMENT 35 9.1 STANDARD REQUIREMENT 35 9.2 EUT ANTENNA 35 APPENDIX 1-TEST DATA 36 1. DUTY CYCLE 36 2. MAXIMUM AVERAGE CONDUCTED OUTPUT POWER 39 3. MAXIMUM PEAK CONDUCTED OUTPUT POWER 42 4. -6DB BANDWIDTH 45 5. MAXIMUM POWER SPECTRAL DENSITY LEVEL 48 6. BAND EDGE 51 7. CONDUCTED RF SPURIOUS EMISSION 54 APPENDIX 2- EUT TEST PHOTO 58 Page 5 of 58 Report No.: STS2304018W02 Revision History Rev. Issue Date Report NO. Effect Page Contents 00 12 Apr. 2023 STS2304018W02 ALL Initial Issue Page 6 of 58 Report No.: STS2304018W02 1. SUMMARY OF TEST RESULTS Test procedures according to the technical standards: KDB 558074 D01 15.247 Meas Guidance v05r02. FCC Part 15.247,Subpart C Standard Section Test Item Judgment Remark 15.207 Conducted Emission PASS -- 15.247 (a)(2) 6dB Bandwidth PASS -- 15.247 (b)(3) Output Power PASS -- 15.209 Radiated Spurious Emission PASS -- 15.247 (d) Conducted Spurious & Band Edge Emission PASS -- 15.247 (e) Power Spectral Density PASS -- 15.205 Restricted bands of operation PASS -- Part 15.247(d)/ Part 15.209(a) Band Edge Emission PASS -- 15.203 Antenna Requirement PASS -- NOTE: (1) ‘N/A’ denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10-2013. Page 7 of 58 Report No.: STS2304018W02 1.1 TEST FACTORY SHENZHEN STS TEST SERVICES CO., LTD Add. : A 1/F, Building B, Zhuoke Science Park, No.190 Chongqing Road, HepingShequ, Fuyong Sub-District, Bao’an District, Shenzhen, Guang Dong, China FCC test Firm Registration Number: 625569 IC test Firm Registration Number: 12108A A2LA Certificate No.: 4338.01 1.2 MEASUREMENT UNCERTAINTY The reported uncertainty of measurement y ± U, where expended uncertainty U is based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95 %. No. Item Uncertainty 1 RF output power, conducted ±1.197dB 2 Unwanted Emissions, conducted ±2.896dB 3 All emissions, radiated 9K-30MHz ±3.84dB 4 All emissions, radiated 30M-1GHz ±3.94dB 5 All emissions, radiated 1G-6GHz ±4.59dB 6 All emissions, radiated>6G ±5.22dB 7 Conducted Emission (9KHz-150KHz) ±2.14dB 8 Conducted Emission (150KHz-30MHz) ±…

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Page 1 of 2 FCC ID: 2AKS8-DX-BT26 DTS Setup photo Model Number: DX-BT26 DTS conduction DTS radiation L Page 2 of 2 FCC ID: 2AKS8-DX-BT26 DTS radiation H