The ASUS USB-BT400 USB adapter with Bluetooth dongle receiver is a great way to connect your laptop or PC to a variety of Bluetooth-enabled devices. This Bluetooth 4.0 adapter is compatible with a wide range of operating systems, including Windows 8, 32-bit/64-bit, Windows 7, 32-bit/64-bit, and Windows XP, 32-bit/64-bit. The USB 2.0 adapter has a range of up to 3Mbps and over 10 meters in free space, making it a great choice for a variety of uses. The ASUS USB-BT400 USB adapter is a great way to connect to a variety of Bluetooth-enabled devices, including keyboards, mice, headsets, and more. The adapter is also great for use with Bluetooth speakers, as it has a range of up to 3Mbps. The adapter is also backward compatible with Bluetooth 2.0 and 1.2 devices.