Note:Win 7 need to install drivers.If your computer system is Win8.1/10/11, you do not need to install the driver.It is driver-free for Win8.1 and above system. This product is not supported on Mac OS/IOS system. Bluetooth adapter is a new product with high version and high speed, with strong compatibility, high speed and stability, and longer receiving distance. Realize wirele connection between computer and other Bluetooth protocol devices (Bluetooth headset/speaker/mouse/keyboard/gamepad/mobile phone/printer, etc.) for audio, data and image transmiion. Features: 1.RTL8761BW chip, which truly conforms to the technical specification of Bluetooth 5.3, has dual-mode low-power transmiion. 2. Longer transmiion distance: 10-20m long transmiion distance (no barrier), strong signal. 3. More stable transmiion rate: 3Mbps transmiion rate, providing high-speed file and audio data transmiion. 4. Ultra-low delay speed link, intelligent sleep wake-up to save energy, 24-bit CRC check to resist interference, adaptive frequency hopping to reduce crotalk. 5. Complete backwards compatibility Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0, Bluetooth 4.0, Bluetooth 5.0, Bluetooth 5.1 and other specifications. 6.USB2.0 interface is more universal, and the ultra-mini body is portable.