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 5.3 150m Chip: (RTL8761BW) 1. Upgrade Bluetooth 5.3+BLE (LMP:12.45) 2. Compatible with Bluetooth versions such as 5.2/5.1/5.0/4.0/3.0/2.0. 3. Low power consumption, low delay and high-definition sound quality 4.Win8.1/10/11 driver-free, plug and play, Win 7 need to install drivers. 5. Connect once, and connect automatically. 6. Support simultaneous connection of multiple devices 7. Wide compatibility (Bluetooth headset/speaker/Bluetooth mouse/keyboard/Bluetooth handle/printer/Android) 8. External dual antennas, 150 meters distance 9. Support A2DP/HSP/AVRCP/HID/SBC/AAC and other protocols Long distance BT receving and transmitting 150 meters(open distance)External dual antenna enhancement Drive free plug and play Rotatable antennaAdjust signal to improve signal sensitivity Once matched,flash connect from here