Bluetooth CSR V4.0 Dual Mode Wireless Adapter 20m 3Mbps for Windows 8 7 Features: Mini USB Bluetooth 4.0 adapter with high speed up to 3Mbps. pairing, good anti-jamming features, no need to down drive. Bluetooth low energy Radio USB. 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. It's a solution to your computer connect with smartphone, tablet or other Bluetooth device. Specification: Type Bluetooth Adapter Metal, plastic Quantity 1 pcs Item Color As shown Version CSR4.0+EDR Operation System Windows 98, 98 se, Me, 2000, XP,, Windows7 Interface USB compliance Rate 3Mbps Receiving / Sending Range Up to 20m / 65.6ft Certifications FCC, Size 2.2*1.5*0.6cm / 0.9*0.6*0.2" Net Weight 2g / 0.07oz Package Content: 1 xWireless Adapter