Characteristics and Interoperability Haing Bluetooth USB Adapter Receiver 4.0, model number HI-B-303-UBT. Compact USB Bluetooth 4.0 adapter with up to 3Mbps of high speed. Easy pairing, strong anti-jamming capabilities, driver download not required. Bluetooth voice data and other features supported Haing HI-B303-UBT Bluetooth USB Adapter Composition: Metal and plastic Sort: Bluetooth Connector CSR4.0+EDR is the version. Interface: Compliant with USB 3Mbps is the transmission speed. Operational range: 20 metres maximum Operating system: Free driver for Windows XP, Vista, and 2000 Operation Compact USB Bluetooth 4.0 adapter with up to 3Mbps of high speed. Easy pairing, effective anti-jamming features, and driver download not required Bluetooth low-power radio USB dongle, Bluetooth transfer in two modes Choose from 1.2 to 3.6 VI/O low power options; supports Bluetooth voice data; supports multiple languages. Operating system: Drivers for Windows XP/7/Vista/2000 are free, but Windows 8 requires installation