Bison&reg; USB 2.0 Mini Bluetooth 4.0 Csr4.0 Adapter Dongle for Pc Laptop Desktop 32 Bit and 64 Bit Window Xp Vista 7 8.1 Latest Bluetooth specification v4.0 Class 2 with low energy technology; Fully compatible with older Bluetooth with Bluetooth 2.0, Bluetooth 2.1, Bluetooth 3.0 specification Connect your Computer/Laptop with Bluetooth Enabled Devices such as Mobile Phones, Printers, Headsets etc. Compatible with 32 bit and 64 bit Windows 8.1/ Windows 8 / Windows 7 / Vista / XP Using CSR8510 chip, compliant with the Bluetooth 4.0 specification, dual-mode transmission Wireless range of up to 30 feet (10 meters) ONE Year Warranty!!