Features: This mini USB Bluetooth 4.0 adapter with high speed, simple pairing, good anti-jamming features, its a simple solution to enable your computer connect with smartphone, tablet or other Bluetooth device. 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. Backward compatible with Bluetooth v1.2/2.0/2.1/3.0. Specifications: Version: CSR4.0 Operation system: Windows/ME/2000/XP/2003/VISTA/WIN7/8/8.1 Interface: USB compliance Rate: 3Mbps Receiving/Sending range: 20m Certifications: FCC, CE Color: Black Product size: about 2.2 * 1.7 * 0.7cm Net weight: 2g Packing content: 1 * 4.0 Bluetooth adapter.