Model: HI-B303-UBT Color: Black Material: Plastic + metal Type: Bluetooth Adapter Version: CSR4.0+EDR Interface: USB compliance Transmission speed: 3Mbps Working range: Up to 20 meters Operating system: Window XP/7/Vista/2000 free driver Dimensions (LxWxH): 2.2cm x 1.6cm x 0.5cm