Cable Matters Gold Plated Bluetooth 4.0 Low Energy USB Adapter for Windows 8.1/8/7/Vista/XP in White 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 Bluetooth Adapter with Low Energy Design Compatible with Windows XP/Vista/7/8/8.1 Comes with Cable Matters Limited One Year Warranty