Item Type: USB BT Adapter_x000D_ Material: ABS_x000D_ Color: Black_x000D_ BT Version: V5.11Convenient and Practical: USB BT adapter helps add BT functionality to USB devices without BT, helping to achieve wireless connectivity for your daily use 2Wide Coverage: BT 5.1 enables faster and wider coverage, transferring data twice as fast as before and 4 times the range of BLE 3Wide Compatible: 5.1 USB BT adapter is widely available and backwards compatible with BT2.1/3.x/4.x, and can be used with confidence 4Portable and Compact: The small and compact body does not take up too much use space, which is convenient for carry and use 5Supported Systems: Wireless BT adapter supports for win 7, for win 8.1, for win 10, for win 11, for Linux and other operating systems1 x USBBTAdapter