At a Glance.Bluetooth low energy wireless USB adapter, Wireless local area network share interface, 15-20 meter sending range, Features : Bluetooth V4.0 class2 (also compliant Bluetooth 2.1+EDR), Operation System: Windows 7, Windows 8, Vista, XP, Dual-mode Blutooth, Universal serial USB interface: USB 2.0/3.0, Transmission speed: 3MB/s, Enhanced Data Rate (EDR)