Features:brand new and high qualityRocketek Bluetooth-compatible USB 4.0 Adapter dongle is an for 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 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 AdapterBluetooth-compatible Version: 4.0Transmission Signal Distance: 20mColour: BlackMaterial: ABSSize: 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