Cybertech Bluetooth CSR v 4.0 Transmitter Receiver USB 2.0 Dongle for PC Pairs your PC with your favorite bluetooth-enabled devices Compatible with Bluetooth version 4.0 devices and backwards compatible with BT 2.0 and 3.0 Small form factor wont obstruct other ports Plug and Play and also includes driver CD Data rate: 3Mbps, Low Power settings 1.2 to 3.56 VI/O