Feature: This mini USB Bluetooth v4.0 adapter with high speed transfer rate， simple pairing， good anti-jamming features. It's a good solution to enable your pc/laptop connect with smartphone， tablet or other Bluetooth devices. Compatible with most laptops and PC， quick and simple setup. Just plug， install and play. Using CSR chip， compliant with Bluetooth 4.0 specification， dual-mode transmission. Transmission distance up to 20m， signaling strong. Transfer rate up to 3Mbps， providing high-speed file and audio data transmission. Backward compatible with Bluetooth 2.0， Bluetooth 2.1， Bluetooth 3.0 specification Compatible with most Operating system: Windows 2000， XP， Vista Win 7/8 32/64 bitSpecification: Interface: USB 2.0 Bluetooth Standards: Bluetooth 4.0 Transfer rate: Up to 3.0Mbps Chipset: CSR8510 Voltage: 5V (USB bus-powered) Power Consumption: 5V， 90mAh max Radio Frequency: 2.4 GHz to 2.4835 GHzPackage includes: 1 x Mini USB Bluetooth 4.0 Adapter Dongle 1 x Driver Installation CD