ORICO USB Bluetooth 4.0 Micro Adapter Dongle Mini Bluetooth 4.0 Adapter Dongle for Windows XP Vista 2003 2008 7 and 8 32 or 64 Bit ,Low Energy Consumption - Black [BTA-402] Bluetooth 4.0 adapter Features with CSR8510 chip, conforms to bluetooth 4.0 standard,downward compatible with bluetooth 3.0, 2.1,2.0,dual mode transmission The farthest transmission distance can be 20m without obstacle Features with USB2.0 interface,Transfer Rate up to 3Mbps Support system: Windows XP/Vista/7/8/8.1/10