ASUS USB-BT500 Bluetooth 5.0 USB Adapter with Ultra Small Design, Black The ASUS USB-BT500 is a Bluetooth 5.0 adapter that offers a range of up to 4x the distance of Bluetooth 4.0 devices, and 2x the speed. The Ultra Small Design makes it easy to take the device with you on the go. The back of the device is black, and the top has a blue LED indicator. The USB-BT500 is also backward compatible with Bluetooth 2.1/3.x/4.0, so you can connect to a wide range of devices. The USB-BT500 offers a range of up to 4x the distance of Bluetooth 4.0 devices, and 2x the speed. The Ultra Small Design makes it easy to take the device with you on the go. The back of the device is black, and the top has a blue LED indicator. The USB-BT500 is also backward compatible with Bluetooth 2.1/3.x/4.0, so you can connect to a wide range of devices. The USB-BT500 offers a range of up to 4x the distance of Bluetooth 4.0 devices, and 2x the speed. The Ultra Small Design makes it easy to take the device with you on the go. The back of the device is black, and the top has a blue LED indicator. The USB-BT500 is also backward compatible with Bluetooth 2.1/3.x/4.0, so you can connect to a wide range of devices.