A easy way to let your PC to communicate with Bluetooth enabled devices such as mobile phones, printers, Bluetooth headsets and Bluetooth speakers * Class 2 Bluetooth version 4.0, backward compatible with Bluetooth version 1.0, 2.0, and 2.1 * Micro Adapter with Low Energy Design * Compatible with Windows XP/Vista/7/8/8.1 * Comes with Cable Matters Limited One Year Warranty