T2C-BT51Bluetooth USB Dongle

YEALINK NETWORK TECHNOLOGY CO., LTD.Email: [email protected] Web: www.yealink.com BT51A Bluetooth USB Dongle Yealink BT5 1A is a plug-and-play USB Bluetooth dongle that connects your Yealink BH72/BH76 to your PC to ensure a fast and reliable Bluetooth connection. BT51A guarantees a first-rate range of up to 100ft/30m, allowing you to move away freely from your laptop during a call. As for the audio, by incorporating sound quality features to BT51A, you can enjoy the natural sound even when you are away from your desk. Meanwhile, the music will be streamed in amazing HiFi quality via A2DP. > Compatible with BH72/BH76 >Reliable connection > Up to 100ft/30m wireless range >Easy to use >Plug and play Features >PC connection: USB 2.0 >Bluetooth range: Up to 100ft/30m >Bluetooth profiles: HFP 1.6, DIP 1.3, A2DP 1.2 >Bluetooth audio bandwidth: Narroband, Wideband, A2DP >Firmware update via Yealink Connect app >Visual indicator: One blue LED indicates pairing and connection About Yealink Yealink is a global leading provider of enterprise communication and collaboration solutions, offering video conferencing service to worldwide enterprises. Focusing on research and development, Yealink also insists on innovation and creation. With the outstanding technical patents of cloud computing, audio, video and image processing technology, Yealink has built up a panoramic collaboration solution of audio and video conferencing by merging its cloud services with a series of endpoints products. As one of the best providers in more than 140 countries and regions including the US, the UK and Australia, Yealink ranks No.1 in the global market share of SIP phone shipments. Copyright Copyright © 2019 YEALINK(XIAMEN) NETWORK TECHNOLOGY CO., LTD. Copyright © 2019 Yealink(Xiamen) Network Technology CO., LTD. All rights reserved. No parts of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, photocopying, recording, or otherwise, for any purpose, without the express written permission of Yealink(Xiamen) Network Technology CO., LTD. Technical Support Visit Yealink WIKI (http://support.yealink.com/) for firmware downloads, product documents, FAQ, and more. For better service, we sincerely recommend you to use Yealink Ticketing system (https://ticket.yealink.com) to submit all your technical issues. YEALINK(XIAMEN) NE TWORK TECHNOLOGY CO.,LTD. Web: www.yealink.com Copyright©2019 Yealink Inc. All right reserved. Physical Features >OS compatibility (as audio device): - Windows XP/SP3, Windows Vista 32-bit, Windows Vista 64-bit, Windows 7 32-bit, Windows 7 64-bit, Windows 8.1 32-bit, Windows 8.1 64-bit, Windows 10 32-bit, Windows 10 64-bit - MAC OS 10.6 or later >Compatible with BH72/BH76 Compliance Key Features and Benefits >Softphone support (call control): - Fully compatible with Microsoft Teams/ Skype for Business - Compatible with most of PC softclients and, as a minimum, work as audio device >Dimensions (L*W*H): 18*13.9*5.1mm >Operating environment: -10 to + 60 HVIN: BT51 FCC Caution: Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. IMPORTANT NOTE: Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: —Reorient or relocate the receiving antenna. —Increase the separation between the equipment and receiver. —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. —Consult the dealer or an experienced radio/TV technician for help. FCC Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. ISEDC W arning This device complies with Innovation, Science, and Economic Development Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Le présent appareil est conforme aux CNR d' Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil nedoit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. The device is compliance with RF exposure guidelines, users can obtain Canadian information on RF exposure and compliance. Le présent appareil est conforme Après examen de ce matériel aux conformité ou aux limites d’intensité de champ RF, les utilisateurs peuvent sur l’exposition aux radiofréquences et la conformité and compliance d’acquérir les informations correspondantes. Label Trade Mark:Yealink Product Name:Bluetooth USB Dongle Model:BT51A This device complies with part 15 of the FCC Rules. Operation is…

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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: 2022-11-22 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Dear Sir/Madam, The Main chip, model: ATS2831P, installed in our product Bluetooth USB Dongle, model: BT51A, BT52A, FCC ID: T2C-BT51, supports BDR (GFSK), EDR (π/4-DQPSK, 8DPSK), BLE 1M and BLE 2M functions. For use in America and this chip will not support/enable BLE 1M and BLE 2M. The BLE 1M and BLE 2M function has been shielded by the manufacturer using the software. 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] QA-FR-170-B 7/29/2014 FCC Authorization Date: 2022-11-22 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 Shenzhen Accurate Technology Co., Ltd. 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 Shenzhen Accurate Technology Co., Ltd. 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: 2022-11-22 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-BT51 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

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 certification No. Cover Letter We, YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD., hereby submit justification for placing the FCC certification No. in the associated user’s manual. According to the FCC regulation, the FCC certification No. should be printed on the dongle, but as the dongle are too small to print the label (FCC ID: T2C-BT51 , it will be moved to the user manual. The details are as below: A. Side surface (A): The side surface does not provide enough physical space to fit the printing of the FCC certification No. according to below reference picture. B. Top cover (B): The top cover does not provide enough physical space to fit the printing of the FCC certification No. according to below reference picture. C. There are many contents in the label, including the certification requirements of other countries. The product Dimensions (L*W*H) is 18*13.9*5.1mm, there is not enough physical space for such a large label Conclusion: Based on the above description of area A to B and C, we conclude that the device is unquestionably too small for enabling the FCC certification No. to be printed onto any surface. We therefore request to move the FCC certification No. to the user’s manual. Label: Best regards, Signature: Stone Lu Vice General Manager 2022/11/22 Stick the label on page 3 of user manual

Shenzhen Accurate Technology Co., Ltd. FCC ID: T2C-BT51 External Photos Page 1 of 1

Label Trade Mark:Yealink Product Name:Bluetooth USB Dongle Model:BT51A This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. IC:CAN ICES-3(B)/NMB-3(B) FCC ID:T2C-BT51 IC:10741A-BT51 HVIN: BT51 Yealink Network Technology Co.,Ltd No.666 Hu’an Rd. Huli District Ximen City, Fujian, P.R. China Made in China

Shenzhen Accurate Technology Co., Ltd. FCC ID: T2C-BT51 Internal Photos Page 1 of 2 Internal photos Chip Shenzhen Accurate Technology Co., Ltd. FCC ID: T2C-BT51 Internal Photos Page 2 of 2 Antenna

Shenzhen Accurate Technology Co., Ltd. Report No.: RA221111-53265E-RF Version 15: 2021-11-09 Page 11 of 63 FCC-BT；RSS-BT FCC§15.247 (i), §1.1307 (b) (3) &§2.1093 – RF EXPOSURE Applicable Standard According to FCC §2.1093 and §1.1307(b) (3), 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 D04 Interim General RF Exposure Guidance SAR-Based Exemption: SAR-based thresholds are derived based on frequency, power, and separation distance of the RF source. The formula defines the thresholds in general for either available maximum timeaveraged power or maximum time-averaged ERP, whichever is greater. Per § 1.1307(b)(3)(i)(B), 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: the available maximum time-averaged power or effective radiated power (ERP), whichever is greater, is less than or equal to the threshold P th (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). P th is given by: Shenzhen Accurate Technology Co., Ltd. Report No.: RA221111-53265E-RF Version 15: 2021-11-09 Page 12 of 63 FCC-BT；RSS-BT For worst case: Exemption limit: For f=2.48GHz, d=0.5cm, the P th =2.72mW The higher of the available maximum time-averaged power or effective radiated power (ERP): The antenna gain is 0.51dBi (-1.64dBd), 0dBd=2.15dBi The maximum tune-up conducted power is 0.5dBm (1.12mW), which less than 2.72mW@2480MHz exemption limit. So the stand-alone SAR evaluation can be exempted.

Antenna Specification Manufacture: YEALINK(XIAMEN) NETWORK TECHNOLOGY CO.,LTD. Address: No.666 Hu'an Rd. Huli District Xiamen City, Fujian, P.R. China Specifications Summary Antenna Photo 2402MHz 2442MHz 2480MHz Point ValuesMinimum Gain (dB)Maximum Gain (dB) Average Gain (dB) Frequency (MHz) 2402-13.20000.00000-4.76000 2442-12.90000.46000-3.90000 2484-13.00000.51000-3.70000 3D antenna pattern2D antenna pattern（X->Y;X->Z;Y->Z) 3D antenna pattern2D antenna pattern（X->Y;X->Z;Y->Z) 3D antenna pattern 2D antenna pattern（X->Y;X->Z;Y->Z) MAX. GAIN0.51 dBi Impedance ITEMSPEC. Model Name2.4GHz Center Frequency 2402 MHz0dBi 2442 MHz0.46dBi 2484 MHz0.51dBi Flattened drawing

Shenzhen Accurate Technology Co., Ltd. Project No.: RA221111-53265E-RF Test Photos Page 1 of 3 Photo of Conducted Emission Measurement Shenzhen Accurate Technology Co., Ltd. Project No.: RA221111-53265E-RF Test Photos Page 2 of 3 Photo of Radiated Emission Measurement (Below 1G) Photo of Radiated Emission Measurement (Above 1G) Shenzhen Accurate Technology Co., Ltd. Project No.: RA221111-53265E-RF Test Photos Page 3 of 3 Photo of Radiated Emission Measurement (Below 1G) Photo of Radiated Emission Measurement (Above 1G)