Specification: _x005f_x000D_ Model: RTL806 _x005f_x000D_ Color: black, white (optional) _x005f_x000D_ Bluetooth-Compatible version: Bluetooth-Compatible 5.3 _x005f_x000D_ Transmission distance: 20m (in an accessible environment) _x005f_x000D_ Support protocols: A2DP, HSP, AVRCP, HID, etc _x005f_x000D_ Product size: 31 * 15 * 8mm/1.22 * 0.59 * 0.31 inch _x005f_x000D_ Including packaging weight: 28g _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-Quality Chipset: The device uses the Taiwan-based Realtek RTL8761BW chip that meets Bluetooth-Compatible 5.3 technology standards, offering low-power dual-mode transmission. 2. Extended Transmission Distance and Stable Connection: With a range of 10-20 meters (without obstacles), this USB adapter provides a stable and robust signal with a 3Mbps transfer rate, enabling high-speed file, audio, and data transfer. 3. Original Driver Management Software: The REALTEK driver management software is easy to use and offers powerful features that support multiple application extensions. It also enables ultra-low latency, intelligent sleep-wake mode for energy efficiency, 24-bit CRC check resistance to interference, and adaptive frequency hopping to reduce crosstalk. 4. Full Compatibility: The device is fully compatible with various Bluetooth-Compatible specifications like Bluetooth-Compatible 2.0, 2.1, 3.0, 4.0, 5.0, 5.1, making it versatile for use with a wide range of devices.