Features: 1.Support System: Adapter is easy to operate, plug and play, and has strong compatibility. It supports for Windows7, for WIN8, for WIN10, for Vista, for XP, for OS X and other systems. 2.BT 5.0 Chip: USB audio receiver uses BT 5.0 high performance chip to increase wireless connection speed and improve stability 3.Wireless Transmission: Solve the problem that the computer does not have BT, realize BT wireless transmission, and have no effect on WHF signals. 4.Lightweight and Portable: USB adapter is light in weight, small in size, easy to carry and store, convenient and fast, and stable in performance. 5.Scope of Application: Audio adapter supports connecting BT speakers, earphones, mice, keyboards, printers and other devices to enjoy the free of wireless. specification:Item Type: USB Audio Receiver Material: ABS Colour: Black BT Version: V5.0 Transmission Distance: Approx. 10-20meters / 10.9-21.9yd Support Configuration: Keyboard, Mouse, Speaker, Headset, etc. Compatible Systems: For Windows7, for WIN8, for WIN10, for Vista, for XP, for OS X, etc. PackageList:1 x USBAudioReceiver