Specification: _x005f_x000D_ Model: RTL810 _x005f_x000D_ Bluetooth-Compatible version: Bluetooth-Compatible 5.3 _x005f_x000D_ Transmission distance: 20 meters (in an accessible environment) _x005f_x000D_ Support protocols: A2DP, HSP, AVRCP, HD, etc _x005f_x000D_ Packaging size: 110 * 90 * 12mm/4.33 * 3.54 * 0.47inch _x005f_x000D_ Product size: 25 * 17 * 8mm/0.98 * 0.66 * 0.31 inch _x005f_x000D_ Gross weight: 25g _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x USB adapter _x005f_x000D_ 1 x CD disc _x005f_x000D_ 1 x Instruction manual 1. High-Speed Bluetooth-Compatible 5.3: This adapter is a new high-speed product with strong compatibility, stable connectivity, and long-range reception. It supports Windows 7/8.1/10/11 operating systems and enables wireless connections for various Bluetooth-Compatible devices such as headphones, speakers, mice, keyboards, gamepads, smartphones, printers, and more. 2. High-Quality Chipset: This adapter uses Realtek RTL8761BW chipset, which meets the latest Bluetooth-Compatible 5.3 technology standards. It supports dual-mode low-power transmission with enhanced stability and reliability. 3. Extended Transmission Range: With a transmission range of up to 10-20m (without obstacles), this adapter provides powerful and stable signals for seamless audio and file transfer. 4. Original Drive Management Software: The Realtek driver management software is easy to use, feature-rich, and compatible with various applications.