2BCV2-D6Wireless audio receiver/transmitter

Shenzhen Dili Sheng electronic Technology Co., LTD Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 16, 2023 FCC ID: 2BCV2-D6 Ref. #1: Attestation Statements Part 2.911(d)(5)(i) Filing Shenzhen Dili Sheng electronic Technology Co., LTD 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. Ref. #2: Attestation Statements Part 2.911(d)(5)(ii) Filing Shenzhen Dili Sheng electronic Technology Co., LTD 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. Applicant: Shenzhen Dili Sheng electronic Technology Co., LTD Address: 2nd Floor, Building 3, Jinpeng Industrial Zone, Bantian, Longgang District, Shenzhen, China Contact Person: Wenfu Lai Tel.: +86-18888416887 Email: [email protected] Sincerely, Signature:

Shenzhen Dili Sheng electronic Technology Co., LTD U.S. Agent Letter of Attestation To: Federal Communications Commission 7435 Oakland Mills Road, Columbia, MD 21046, USA Date: 09-15-2023 Ref: Attestation Statement – Part 2.911(d)(7) filing FCC ID: 2BCV2-D6 Shenzhen Dili Sheng electronic Technology Co., LTD(“the applicant”) certifies that, as of the date of the filing of the application, CLF Import and Export Limited (“the agent”) is our designated U.S. agent for service of process for the above reference FCC ID. The applicant accepts 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. The applicant further acknowledges it is our responsibility to inform the FCC whenever the agent information changes. CLF Import and Export Limited ("the agent) understand it is the agent's obligation to accept service of process in the United States for matters related to the applicable equipment, and at the physical U.S. address and email address. Designated U.S. Agent Company Name: CLF Import and Export Limited FRN: 0033489683 Address: 1312 17th Street #692, Denver, CO 80202, United States Signature: Contact Person: David Chen Tel: +1 949 254 2565 Email: [email protected] Applicant Company Name: Shenzhen Dili Sheng electronic Technology Co., LTD Address: 2nd Floor, Building 3, Jinpeng Industrial Zone, Bantian, Longgang District, Shenzhen, China Signature: Contact Person: Wenfu Lai Tel: +86-18888416887 Email: [email protected]

Report No: SSP23090021A Antenna Test Report Page 1 of 4 Antenna Test Report Test Standard: IEEE 149-1979 Manufacturer: Shenzhen Dili Sheng electronic Technology Co., LTD Product Name: 2.4GHz Antenna Model: D6 Report No.: SSP23090021A Tested Date: 2023-08-31 Issued Date: 2023-09-01 Tested By: William Liu (Engineer) Approved By: Lahm Peng (Manager) Prepared By: Shenzhen ZRLK Testing Technology Co., Ltd. 1F, No. 35 Building, Changxing Technology Industrial Park, Yutang Street, Guangming New District, Shenzhen City, Guangdong Province, China Tel.: +86-755-33019599 Fax.: +86-755-33019599 Website: www.zrlklab.com Note: This test report is limited to the above client company and the product model only. It may not be duplicated without prior permitted by Shenzhen ZRLK Testing Technology Co., Ltd. Report No: SSP23090021A Antenna Test Report Page 2 of 4 1. General Information 1.1 Product Information Manufacturer Manufacturer: Shenzhen Dili Sheng electronic Technology Co., LTD Address of Manufacturer: 2nd Floor, Building 3, Jinpeng Industrial Zone, Bantian, Longgang District, Shenzhen, China General Description of Antenna Product Name: 2.4GHz Antenna Model No.: D6 Frequency Range: 2400MHz-2483.5MHz Type of Antenna: Integral Antenna Antenna Gain: 0dBi (Max.) Impedance: 50 ohm Antenna View (140mm*5mm) 1.2 Test Methodology All measurements contained in this report were conducted with standards IEEE 149-1979 for IEEE Standard Test Procedures for Antennas. 1.3 Test Facilities Testing Lab: Shenzhen ZRLK Testing Technology Co., Ltd. All measurement facilities used to collect the measurement data are located at 1F, No. 35 Building, Changxing Technology Industrial Park, Yutang Street, Guangming New District, Shenzhen City, Guangdong Province, China Report No: SSP23090021A Antenna Test Report Page 3 of 4 2. OTA Test 2.1 Gain Frequency Peak Gain (dBi) Polarity 2402MHz 0 Horizontal 2402MHz -0.65 Vertical 2442MHz -1.66 Horizontal 2442MHz -2.52 Vertical 2480MHz -2.72 Horizontal 2480MHz -2.98 Vertical 2.2 Radiation Pattern View Report No: SSP23090021A Antenna Test Report Page 4 of 4

Shenzhen Dili Sheng electronic Technology Co., LTD Date: September 16, 2023 Product Model Number: D6, D300-HD, D500-HD, D200, D400, D08, D08M, D600, D800, BT-11, C28, B6, D28, D58, BT100, BT200, BT300, BT500, M1, M2, M3, M5 FCC ID: 2BCV2-D6 To whom it may concern, Re: Product Certification Representative Authorization Letter We authorize QAI Laboratories Ltd. 3980 North Fraser Way, Burnaby B.C. Canada V5J 5K5 to act on our behalf on all matters concerning the above named equipment. This shall include the following: • Testing • Approval applications and procedures We declare that ORGANIZATION. is allowed to forward all information related to the approval project to the applied certification body and to the notification entities and to discuss any issues concerning the approval application. Any and all acts carried out by ORGANIZATION. on our behalf shall have the same effect as acts of our own. By: Wenfu Lai Contact Listed on FCC Wesbite Title: Manager Email: [email protected] Telephone: +86-18888416887 On behalf of: Shenzhen Dili Sheng electronic Technology Co., LTD

Shenzhen Dili Sheng electronic Technology Co., LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 16, 2023 Subject; Request for Confidentiality FCC ID: 2BCV2-D6 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Parts List Operational Description Tune-up Procedure Software Security Requirements for UNII devices In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Wenfu Lai Title: Manager

Shenzhen Dili Sheng electronic Technology Co., LTD Model Difference Statement Dear Sir/Madam, Added models D300-HD, D500-HD, D200, D400, D08, D08M, D600, D800, BT-11, C28, B6, D28, D58, BT100, BT200, BT300, BT500, M1, M2, M3, M5 basis of the original product D6. The color of appearance and model name of series models listed are different from the main model, but the circuit and the electronic construction are the same, declared by the manufacturer. Sincerely, Name: Wenfu Lai Title: Manager Company name: Shenzhen Dili Sheng electronic Technology Co., LTD Address: 2nd Floor, Building 3, Jinpeng Industrial Zone, Bantian, Longgang District, Shenzhen, China

FCC ID: 2BCV2-D6 External

Page 1 of 1 Label and Information FCC Label Sample FCC Label Specifications Text is Black in color and is justified. Labels are printed in indelible ink on permanent adhesive backing or silk-screened onto the EUT or shall be affixed at a conspicuous location on the EUT. Where the EUT is constructed in two or more sections connected by wires and marketed together, the above statement is required to be affixed only to the main control unit. When the EUT is so small or for such use that it is not practicable to place the statement on it, the above information shall be placed in a prominent location in the instruction manual or pamphlet supplied to the user or, alternatively, shall be placed on the container in which the device is marketed. FCC Label Location

FCC ID: 2BCV2-D6 Internal BT ANT

- Page 1 of 9 - Report No.: HB20230914001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com RF EXPOSURE Test Report Product: Wireless audio receiver/transmitter Trade Mark: - Model Number: D6 FCC ID: 2BCV2-D6 Prepared for Shenzhen Dili Sheng electronic Technology Co., LTD 2nd Floor, Building 3, Jinpeng Industrial Zone, Bantian, Longgang District, Shenzhen, China Prepared by Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Tel.: +86-755-2998 9321 Fax.: +86-755-2998 5110 Website: http://www.sz-hongbiao.com - Page 2 of 9 - Report No.: HB20230914001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 5 1.1 DESCRIPTION OF EUT ................................................................................................................................................. 5 1.2 TEST MODE .............................................................................................................................................................. 5 1.3 ANCILLARY EQUIPMENT .............................................................................................................................................. 5 2 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................. 6 2.1 TEST LABORATORY ..................................................................................................................................................... 6 2.2 ENVIRONMENTAL CONDITIONS ..................................................................................................................................... 6 2.3 MEASUREMENT UNCERTAINTY ..................................................................................................................................... 6 2.4 TEST SOFTWARE ........................................................................................................................................................ 6 3 LIST OF TEST EQUIPMENT .................................................................................................................................. 7 4 RF EXPOSURE .................................................................................................................................................... 8 4.1 STANDALONE SAR TEST EXCLUSION CONSIDERATIONS........................................................................................................ 8 4.1.1. Limit ............................................................................................................................................................ 8 4.1.2. Test Procedures ........................................................................................................................................... 8 4.1.3. Test Result ................................................................................................................................................... 9 - Page 3 of 9 - Report No.: HB20230914001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com TEST RESULT CERTIFICATION Applicant’s Name ................. : Shenzhen Dili Sheng electronic Technology Co., LTD Address ................................. : 2nd Floor, Building 3, Jinpeng Industrial Zone, Bantian, Longgang District, Shenzhen, China Manufacturer's Name .......... : Shenzhen Dili Sheng electronic Technology Co., LTD Address ................................. : 2nd Floor, Building 3, Jinpeng Industrial Zone, Bantian, Longgang District, Shenzhen, China Product description Product name ........................ : Wireless audio receiver/transmitter Model Number ....................... : D6 Standards ............................. : FCC CFR 47 PART 1 , 1.1310 Test procedure ..................... : KDB 447498 D01 v06 This device described above has been tested by Shenzhen HongBiao Certification& Testing Co., Ltd and the test results show that the equipment under test (EUT) is in compliance with the EMC requirements. And it is applicable only to the tested sample identified in the report. Date of Test ........................................... : Date (s) of performance of tests ............. : September 06. 2023 ~ September 13. 2023 Test Result .............................................. : Pass Testing Engineer : ( Z o e Su) Technical Manager : ( G a r y Lu) Authorized Signatory : (L e o S u) - Page 4 of 9 - Report No.: HB20230914001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Revision History Revised No. Date of Issue Description 01 September 14. 2023 Original - Page 5 of 9 - Report No.: HB20230914001E-02 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com 1 General Description 1.1 Description of EUT Product name: Wireless audio receiver/transmitter Model name: D6 Series Model: D300-HD, D500-HD, D200, D400, D08, D08M, D600, D800, BT-11, C28, B6, D28, D5…

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- Page 1 of 50 - Report No.: HB20230914001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Test Report Product: Wireless audio receiver/transmitter Trade Mark: - Model Number: D6 FCC ID: 2BCV2-D6 Prepared for Shenzhen Dili Sheng electronic Technology Co., LTD 2nd Floor, Building 3, Jinpeng Industrial Zone, Bantian, Longgang District, Shenzhen, China Prepared by Shenzhen HongBiao Certification& Testing Co., Ltd Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen, China Tel.: +86-755-2998 9321 Fax.: +86-755-2998 5110 Website: http://www.sz-hongbiao.com - Page 2 of 50 - Report No.: HB20230914001E-01 Add:Room 102, 201, Building 2, Yuanwanggu RFID Industrial Park, Tongguan Road, Tianliao Community, Yutang Street, Guangming District, Shenzhen,China Tel: (86-755) 29989321 Fax: (86-755) 29985110 Web:www.sz-hongbiao.com Table of Contents 1 GENERAL DESCRIPTION ..................................................................................................................................... 6 1.1 DESCRIPTION OF EUT ................................................................................................................................................. 6 1.2 TEST MODE .............................................................................................................................................................. 6 1.3 OPERATION CHANNEL LIST .......................................................................................................................................... 6 1.4 TEST SETUP .............................................................................................................................................................. 7 1.5 ANCILLARY EQUIPMENT .............................................................................................................................................. 7 2 SUMMARY OF TEST RESULT ............................................................................................................................... 8 3 TEST FACILITIES AND ACCREDITATIONS .............................................................................................................. 9 3.1 TEST LABORATORY ..................................................................................................................................................... 9 3.2 ENVIRONMENTAL CONDITIONS ..................................................................................................................................... 9 3.3 MEASUREMENT UNCERTAINTY ..................................................................................................................................... 9 3.4 TEST SOFTWARE ........................................................................................................................................................ 9 4 LIST OF TEST EQUIPMENT .................................................................................................................................10 5 TEST ITEM AND RESULTS ...................................................................................................................................12 5.1 ANTENNA REQUIREMENT .......................................................................................................................................... 12 5.1.1 Standard Requirement ............................................................................................................................. 12 5.1.2 Test Result ................................................................................................................................................. 12 5.2 CONDUCTED EMISSION ............................................................................................................................................. 13 5.2.1 Limits ........................................................................................................................................................ 13 5.2.2 Test Procedures ......................................................................................................................................... 13 5.2.3 Test Setup ................................................................................................................................................. 14 5.2.4 Test Result ................................................................................................................................................. 14 5.3 RADIATED EMISSION ................................................................................................................................................ 17 5.3.1 Limits ........................................................................................................................................................ 17 5.3.2 Test Procedures ......................................................................................................................................... 17 5.3.3 Test Setup ................................................................................................................................................. 17 5.3.4 Test Result ................................................................................................................................................. 18 5.3.5 Radiated Band Edge ................................................................................................................................. 23 5.4 PEAK OUTPUT POWER .............................................................................................................................................. 24 5.4.1 Limit ...........................................................................................…

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FCC ID: 2BCV2-D6 Radiated Emission Below 1GHz Radiated Emission Above 1GHz Conducted emission