Descriptions: This mini USB Bluetooth 4.0 adapter with high speed， simple pairing， good anti-jamming features， it's a simple solution to enable your computer connect with smartphone， tablet or other Bluetooth device. Features: Simple pairing. Good anti-jamming. Bluetooth low energy Radio USB Dongle. Dual-mode Bluetooth transfer. Low-power selectable 1.2 to 3.6 VI\/O. Supporting Bluetooth voice data. Supporting multi languages. WLAN coexistence interface Backward compatible with Bluetooth v1.2\/2.0\/2.1\/3.0. Specifications: Version: CSR4.0 Operation system: Windows 98， 98se， Me， 2000， XP， Vista， Windows7 Interface: USB compliance Rate: 3Mbps Receiving\/Sending range: 20m-50m Certifications: FCC， CE Size: 2.3 * 1.2 * 0.4cm Note:You can download the drive here Package Included: 1 x V4.0 Bluetooth Adapter Dongle