Kinivo BTD-400 Bluetooth 4.0 USB Adapter - For Windows 7/Vista Type: Bluetooth Adapter Operating Range: 30 Feet Bluetooth Version: 4.0 Compatibility: Compatible with Windows 8 / Windows 7 / Vista / XP. Not compatible with Mac OS Consumes very low power from the host PC Note: Windows 8 automatically finds and installs the latest drivers when the BTD-400 dongle is plugged in for the first time. Windows 7 / Vista / XP users need to use the included CD (or online links) to install the drivers