Features: 100% brand new and high quality Rocketek Bluetooth-compatible USB 4.0 Adapter dongle is an Ideal Solution to Transfer Files, Audio or Voice Wirelessly to your Desktop and Laptop. It Achieved with CSR 8510 A10 Class 2 Low Power Controller Fully Satisfied with Bluetooth-compatible 4.0 Specification. Advanced Audio Processing Unique to Improve Bluetooth-compatible 4.0 Voice Quality allow you to process AAC Audio Losslessly as well as Process MP3, WAV, APE or FLAC. Enabled Nail Size Micro Adapter allows Plug and Play. Supported Windows XP, Vista, Windows and 7 (with CSR drivers included.).Windows 8 (with built-in drivers; RSE drivers not needed for most common profiles).Linux kernels 3.0.34 and above, with open source stack (may have limited functionality vs Windows). Supported bluetooth-compatible wireless keyboards, mice, headphones, speakers, printers, modems, serial devices, phones, and more. Package Includes: 1PC x Bluetooth-compatible 4.0 Receiver Transmitter Specifications: Name: Bluetooth-compatible Audio Adapter Bluetooth-compatible Version: 4.0 Transmission Signal Distance: 20m Colour: Black Material: ABS Size: approx. 3.2x1.5x0.75cm/1.3x0.6x0.3in note: Does not work on car or TV stereo systems. Windows 8 automatically finds and installs the latest drivers when the RT-BT4 dongle is turned on for the first time. Windows10, 8, 7/Vista/XP users need to use the included C D (or online links) to install the drivers.