Features: Rocketek Bluetooth-compatible USB 4.0 Adapter dongle is an for Ideal Solution to Transfer Files, Audio or Voice Wirelessly to your Desktop and Laptop. Enabled Nail Size Micro Adapter allows Plug and for Play. Supported for Windows XP, Vista, for Windows and 7 (with CSR drivers included.).for 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 for Windows). Supported bluetooth-compatible wireless keyboards, mice, headphones, speakers, printers, modems, serial devices, phones, and more. 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. for Windows 8 automatically finds and installs the latest drivers when the RT-BT4 dongle is turned on for the first for time. Windows10, 8, 7/Vista/XP users need to use the included C D (or online links) to install the drivers. Package includes: 1PC x Bluetooth-compatible 4.0 Receiver Transmitter