USB-BT500 Bluetooth 5.0 USB Adapter Bluetooth 5.0 for Faster, Further Coverage- Transfer data up to twice as fast as before, and with 4X the range in BLE Wireless Connection, free of limitation - Enables wireless communication with Bluetooth-enabled devices Full Compatibility - Backward compatible with Bluetooth®2.1/3.x/4.x Power Saving for Devices - Bluetooth Low Energy technology for energy-saving wireless connectivity Ultra-small Design - Highly portable and easy to use.