TRENDnet TBW-107UB USB 1.1 Micro Bluetooth USB Adapter Bluetooth Standards: Class II Bluetooth v2.1+ with EDR, SB 2.0 Backwards compatible with Bluetooth v1.1, v1.2, v2.0 and USB 1.1 Antenna: Internal Range: Up to 10m (32.8 ft.) Security: 128 bit data encryption Voltage: 5V (USB bus-powered) Power Consumption: Typical: 95mA; idle: 12mA Tx max: 136mA @19dBm; Rx max: 45mA Sensitivity: - 82dBm ( typical) Operating Systems Supported: Windows 8, 7, Vista, XP, 2000Mac: 10.7-10.8