Description: Product Name: V5.1 Bluetooth Adapter; Interface: USB 2.0; Transmission rate: maximum 10Mbps; Bluetooth-compatible version: Bluetooth-compatible V5.1; Frequency band: 2.400-2.480GHz; Colour: Black; Product size: 21 x 16 x 5mm; Low-power options: 1.2 to 3.6 VI/O; Compatible with Bluetooth-compatible: v1.2/2.0/2.1/3.0/4.0; Supported operating systems: compatible for Windows, Android, Linux, FRERTOS, ThreadX UITRON; Support software: compatible for compatible with Microsoft Bluetooth-compatible software, CSR Har mony, Bluez, Bluesol; Support application functions: HFP/HSP (hands-free phone/headphone) A2DP/AVRCP (stereo music) HID/HOGP (keyboard mouse). DUN/PAN (online), PBAPMA; PFTPSPP.GATT, etc.; Packing list: 1 x Bluetooth Adapter Note: 1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks. 【Exceptional Performance】Engineered for high efficiency and effectiveness, this product delivers outstanding results every time. Its advanced features ensure consistent performance, making it a reliable choice for your needs 【Versatile Functionality】This product is multifunctional and can be used for a variety of tasks, providing you with the flexibility and convenience needed to handle multiple uses with a single tool. 【High-Quality Materials】Crafted from premium, durable materials to ensure longevity and superior performance. Each product is meticulously tested to meet high standards of quality and safety. 【User-Friendly Design】Ergonomically designed for ease of use, this product offers intuitive controls and a comfortable grip, making it perfect for both beginners and experienced users. 【Eco-Friendly and Sustainable】Made with environmentally conscious practices, this product is eco-friendly and contributes to sustainability efforts. It is designed to minimize waste and reduce environmental impact.