NOTEThe USB Bluetooth adapter is compatible with windows 10/8.1/8/7. Win8 /8.1/10 Driver-Free, Plug & Play. Win7 Driver-Needed(Go to the official website or contact us via amazon message or install the driver from the included mini CD) Bluetooth Adapter 5.0Applies the latest Bluetooth 5.0 chipset greatly reduces the power consumption of Bluetooth(BLE). Enhance anti-interference ability and stability, decrease the transmission efficiency loss caused by the interference of the 2.4 GHz frequency band and low the possibility of signal interruption, and it is backward compatible with Bluetooth V4.0/3.0/2.0/1.1 Fast Transmission RateThe Bluetooth USB Adapter supports the Enhanced Data Rate (EDR) technology, which greatly improves the transmission rate, giving you a fast and lag-free wireless data connection between your computer and Bluetooth devices. Easily enjoys music, transferring files, and entertainment during work