COOLEAD Small USB Bluetooth V 4.0 Wireless Adapter Dongle Device for Windows 8,7,XP,Vista Bluetooth 4.0 USB Dongle Adapter It's a simple solution to enable your computer connect with smartphone, tablet or other device via bluetooth. Up to 20m transmission distance ( non-blocking ),Up to 3Mbps transfer rate, providing high-speed file and audio data transmission. Compatible with Bluetooth 1.2, Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0 specification. Compatible with most Operating system: Windows 98, 98 se, Me, 2000, XP, Vista, Windows 7 (32/64 bit),Windows 8 (32/64 bit), 8.1