T2C-BHD742V1Bluetooth Headset

YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. No.666 Hu'an Rd. Huli District Xiamen City, Fujian, P.R. China Tel: 86-592-5702000 Fax: 86-592-5702455 Email: [email protected] Date: 2025-10-17 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir/Madam, Our product Bluetooth Headset, Model: BHD742; FCC ID: T2C-BHD742V1, for marketing purpose, this product only supports BDR (GFSK), EDR (π/4-DQPSK, 8DPSK) and BLE 1M/2M. The other functions, bands and modes were disabled to use by manufacture in the software, the end user has no capability to activate it. Sincerely Yours, Signature: Stone Lu Vice General Manager

YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. No.666 Hu'an Rd. Huli District Xiamen City, Fujian, P.R. China Tel: 86-592-5702000 Fax: 86-592-5702455 Email: [email protected] CFR 47 §2.911(d)(5)(i) Attestation Letter Attestation Letter Date: 2025-10-17 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(i) Filing FCC ID: T2C-BHD742V1 YEALINK(XIAMEN) NETWORK 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. Sincerely, Signature: Stone Lu Vice General Manager

YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. No.666 Hu'an Rd. Huli District Xiamen City, Fujian, P.R. China Tel: 86-592-5702000 Fax: 86-592-5702455 Email: [email protected] CFR 47 §2.911 (d)(5)(ii) Attestation Letter Attestation Letter Date: 2025-10-17 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(5)(ii) Filing FCC ID: T2C-BHD742V1 YEALINK(XIAMEN) NETWORK 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. We also certify that, as of the date of the filing of the application, the equipment does not utilize cyber-security or anti-virus software from Kaspersky Lab, Inc, or any of its successors and assignees, which is also on the “covered list”. Sincerely, Signature: Stone Lu Vice General Manager

U.S. AGENT LETTER OF ATTESTATION Date: 2025-10-17 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Ref: Attestation Statements CFR 47 §2.911(d)(7) Filing FCC ID: T2C-BHD742V1 YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. certifies that, as of the date of the filing of the application, Iconsigh Inc. is our designated U.S. agent for service of process for the above referenced FCC ID. YEALINK(XIAMEN) NETWORK 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 the equipment. Iconsigh Inc. accepts, as of the date of the filing of the application, the obligation of the designated U.S. agent for service of process for the above referenced FCC ID. Designated U.S. Agent Information: Company Name: Iconsigh Inc. Address: 2310 Homestead Road, Suite C1, Los Altos, CA, 94024, USA FRN: 0033398652 Tel.: +1 (408) 320-9867 Email: [email protected] Signed by (printed name): Benjamin Kaur Signature: Applicant: YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. Address: No.666 Hu'an Rd. Huli District Xiamen City, Fujian, P.R. China FRN: 0014702682 Tel: 86-592-5702000 Email: [email protected] Signed by (printed name): Stone Lu Signature:

YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. No.666 Hu'an Rd. Huli District Xiamen City, Fujian, P.R. China Tel: 86-592-5702000 Fax: 86-592-5702455 Email: [email protected] QA-FR-170-B 7/29/2014 FCC Authorization Date: 2025-10-17 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD., the undersigned, hereby authorizes Bay Area Compliance Laboratories Corp. (Shenzhen) to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corp. (Shenzhen) on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature: Stone Lu Vice General Manager

YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. No.666 Hu'an Rd. Huli District Xiamen City, Fujian, P.R. China Tel: 86-592-5702000 Fax: 86-592-5702455 Email: [email protected] FCC Confidential Authorization Date: 2025-10-17 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: T2C-BHD742V1 In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. hereby requests long- term confidential treatment of information accompanying this application as outlined below:  Block Diagram  Schematics  Operation Description As well as short-term confidential treatment of information accompanying this application for a period of 180 days after grant is issued as outlined below:  Internal Photos  User’s Manual  External Photos  Test Set-up Photos The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely Yours, Signature Stone Lu Vice General Manager

Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2501X39906E-RFB TR-EM-RF009 Page 78 of 82 Version 4.1 RF EXPOSURE EVALUATION RF EXPOSURE EVALUATION Applicable Standard According to FCC §2.1093 and §1.1307(b) (1), systems operating under the provisions of this section shall be operated in a manner that ensure that the public is not exposed to radio frequency energy level in excess of the Commission’s guideline. According to KDB 447498 D01 General RF Exposure Guidance v06. The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] • [√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR, where 1. f(GHz) is the RF channel transmit frequency in GHz. 2. Power and distance are rounded to the nearest mW and mm before calculation. 3. The result is rounded to one decimal place for comparison. 4. When the minimum test separation distance is < 5 mm, a distance of 5 mm is applied to determine SAR test Exclusion. Measurement Result For worst case: Mode Frequenc y (MHz) Max tune-up conducted power # (dBm) Max tune-up conducted power # (mW) Distance (mm) Calculate d value Threshol d (1-g SAR) SAR Test Exclusion BT2402-24803.0 2.00 50.6 3.0 Yes Result: Compliant Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2501X39906E-RFB TR-EM-RF009 Page 79 of 82 Version 4.1 SAR EXEMPTION LIMITS Applicable Standard According to RSS-102 Issue 6 § (6.3), Devices operating at or below the applicable output power levels (adjusted for tune-up tolerance) specified in table 11, based on the separation distance, are exempt from SAR evaluation. The separation distance, defined as the distance between the user and/or bystander and the antenna and/or radiating element of the device or the outer surface of the device, shall be less than or equal to 20 cm for these exemption limits to apply. Table 11: Power limits for exemption from routine SAR evaluation based on the separation distance The exemption limits in table 11 are based on measurements and simulations of half-wave dipole antennas at separation distances of 5 mm to 50 mm from a flat phantom, which provides a SAR value of approximately 0.4 W/kg for 1 g of tissue. For limb-worn devices where the 10 gram of tissue applies, the exemption limits for routine evaluation in table 11 are multiplied by a factor of 2.5. For controlled-use devices where the 8 W/kg for 1 gram of tissue applies, the exemption limits for routine evaluation in table 11 are multiplied by a factor of 5. When the operating frequency of the device is between two frequencies located in table 11, linear interpolation shall be applied for the applicable separation distance. If the separation distance of the device is between two distances located in table 11, linear interpolation may be applied for the applicable frequency. Alternatively, the limit corresponding to the smaller distance may be employed. For example, in case of a 7 mm separation distance, either use the exception value for a 5 mm separation distance or interpolate between the limits corresponding to 5 mm and 10 mm separation distances. For implanted medical devices, the exemption limit for routine SAR evaluation is set at an output power of 1 mW, regardless of frequency. The SAR levels from exempted transmitters shall be included in the compliance assessment and the determination of the TER. Detailed guidance is included in sections 7.1.8 and 8.2.2.1. Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2501X39906E-RFB TR-EM-RF009 Page 80 of 82 Version 4.1 Test Result: For worst case: Mode Frequency (MHz) Gain # (dBi) Max tune-up conducted power # (dBm) Max tune-up EIRP # (dBm) Max tune-up EIRP # (mW) Distance (mm) Exemption Limit (mW) SAR Evaluation Exemption BT2402-2480 1.183.0 4.18 2.62 52.97Yes Note 1: (2480-2450)/(3500-2450)= (3-P)/(3-2), the exemption limit of 2480MHz is P= 2.97 mW Note 2: The max tune-up conducted power # and antenna gain # were declared by the applicant

Note: The information marked # is provided by the applicant, the laboratory is not responsible for its authenticity and this information can affect the validity of the result in the test report. Customer model name, addresses, names, trademarks etc. are included. This report cannot be reproduced except in full, without prior written approval of the Company. Unless otherwise stated the results shown in this test report refer only to the sample(s) tested. This report is valid only with a valid digital signature. The digital signature may be available only under the Adobe software above version 7.0. This report must not be used by the customer to claim product certification, approval, or endorsement by NVLAP or any agency of the U.S. Government. This report may contain data that are not covered by the NVLAP accreditation and are marked with an asterisk “▼”. Bay Area Compliance Laboratories Corp. (Shenzhen) 5F(B-West) , 6F, 7F, the 3rd Phase of Wan Li Industrial Building D, Shihua Rd, FuTian Free Trade Zone, Shenzhen, China Tel: +86-755-33320018 Fax: +86-755-33320008 www.baclcorp.com.cn TR-EM-RF009 Page 1 of 82 Version 4.1 TEST REPORT Applicant Name:YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. Address:No.666 Hu'an Rd. Huli District Xiamen City, Fujian, P.R. China Report Number:2501X39906E-RFB FCC ID:T2C-BHD742V1 IC:10471A-BHD742V1 Test Standard (s) FCC PART 15.247; RSS-GEN ISSUE 5, FEBRUARY 2021 AMENDMENT 2; RSS-247 ISSUE 3, AUGUST 2023 Sample Description Product Type:Bluetooth Headset Model No.:BHD742 Multiple Model(s) No.:N/A Trade Mark: Date Received:2025/09/19 Issue Date:2025/10/27 Test Result:Pass ▲ ▲ In the configuration tested, the EUT complied with the standards above. Prepared and Checked By:Approved By: Ruby HuangNancy Wang RF EngineerRF Supervisor Bay Area Compliance Laboratories Corp. (Shenzhen) Report No.: 2501X39906E-RFB TR-EM-RF009 Page 2 of 82 Version 4.1 TABLE OF CONTENTS DOCUMENT REVISION HISTORY ..........................................................................................................................3 GENERAL INFORMATION ........................................................................................................................................4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT)......................................................................................4 OBJECTIVE ....................................................................................................................................................................4 TEST METHODOLOGY....................................................................................................................................................4 MEASUREMENT UNCERTAINTY .....................................................................................................................................5 TEST FACILITY ..............................................................................................................................................................5 SYSTEM TEST CONFIGURATION ...........................................................................................................................6 SUMMARY OF TEST RESULTS ................................................................................................................................8 TEST EQUIPMENT LIST ............................................................................................................................................9 REQUIREMENTS AND TEST PROCEDURES ......................................................................................................11 AC LINE CONDUCTED EMISSIONS...............................................................................................................................11 RADIATED EMISSIONS .................................................................................................................................................13 20 DB EMISSION BANDWIDTH & 99% OCCUPIED BANDWIDTH ..................................................................................16 CHANNEL SEPARATION TEST ......................................................................................................................................18 QUANTITY OF HOPPING CHANNEL TEST .....................................................................................................................20 TIME OF OCCUPANCY (DWELL TIME) .........................................................................................................................22 PEAK OUTPUT POWER MEASUREMENT .......................................................................................................................24 BAND EDGES ...............................................................................................................................................................26 CONDUCTED SPURIOUS EMISSION...............................................................................................................................27 ANTENNA REQUIREMENT .....................................................................................................................................29 TEST DATA AND RESULTS .....................................................................................................................................30 RADIATED EMISSIONS .................................................................................................................................................30 20 DB EMISSION BANDWIDTH .....................................................................................................................................56 99% OCCUPIED BANDWIDTH ......................................................................................................................................59 CHANNEL SEPARATION ..............................................................................................................................…

Text truncated - open the document above for the full version.

Specifications Summary Antenna Photo & Length 天线类型/ ANT Type: PCB天线型号/ ANT Model: Bluetooth antenna Antenna Specification 天线尺寸/ANT Size MAX. GAIN1.18 dBi Impedance 制造商/ Manufactory: YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. No.666 Hu'an Rd. Huli District Xiamen City, Fujian, P.R. China ITEMSPEC. Model Name2.4GHz 2402MHz1.18 dBi 2442MHz1.06 dBi 2484MHz0.57 dBi Center Frequency 2402MHz 2442MHz 3D 3D 2484MHz Point ValuesMinimum Gain (dBi) Maximum Gain (dBi)Average Gain (dBi) Frequency (MHz) 2402-8.21.18-1.93 2442-8.791.06-2.07 2484-9.10.57-2.36 3D 2402MHz 2D（X->Y;X->Z;Y- >Z) 2442MHz 2D（X->Y;X->Z;Y- >Z) 2484MHz2D（X->Y;X->Z;Y- >Z)