Allnice&reg; Gold Plated Wifi Wireless Bluetooth 4.0 Low Energy USB Micro Adapter for Windows 8.1/8/7/Vista/XP Compatible with 32 bit and 64 bit Windows 8.1/8/7/Vista/XP. Micro Adapter with Low Energy Design. Safe to leave in for laptop travel. Compliant with Bluetooth standard version 4.0 and backwards compatible with Bluetooth versions 1.0/2.1/2.0/3.0. Connect your Computer/Laptop with Bluetooth Enabled Devices such as Mobile Phones, Printers, Headsets, Stereo headphones and others. Cable-free file sharing, music streaming, video chatting, printing, gaming and more, from up to 30 feet away (Bluetooth features vary by device).