MAXAH CSR 4.0 Wireless Bluetooth USB 2.0 Adapter Dongle 20 Meter Distance 3Mbs Speed Low Energy Consumption For Windows 8 / Windows 7 / Windows XP / Vista. Fully compliant with Bluetooth 4.0 specification and employ original British CSR8510 controller. Original CSR harmony driver included allow Microsoft Office and other software simply connect with Bluetooth drive. Employ USB 2.0 port, simplyconnect your desktop/laptop PC with Bluetooth-enabled devices such as Keyboards, Mice, Headsets, Headphones, Speakers, Printers, Tablets, Cameras and others. Through Bluetooth 4.0 profile to implement higher speed (3Mbps) and lower energy audio output, data transfer even Internet share. Support extra-long distance data transmission (20M).Through dual-mode transmission achieve more stable Bluetooth connection. Compatible with Windows XP, 2003, Vista, 2008 and Windows 7 / Windows 8 32/64Bit.Additionally, Backward compatible with Bluetooth versions 3.0,2.1 and 2.0 profile equipment.