ASUS USB-BT400 USB 2.0 Bluetooth 4.0 Adapter Bluetooth Standards: Bluetooth 4.0 Transfer rate: Up to 3.0Mbps Antenna: Integrated Antenna Range: Over 10 meters in free space Radio Frequency: 2.4 ~ 2.4835 GHz unlicensed ISM band Operating Systems Supported: Windows 8, 32-bit / 64-bit Windows 7, 32-bit / 64-bit Windows XP, 32-bit / 64-bit Dimensions: 0.32 x 0.77 x 0.63 Weight: 0.01 lb.
