This fantastic little product allows you to wirelessly send audio from your Mac or PC to your Hi-Fi or stereo speakers. It consists of a USB adapter and a wireless receiver unit. The adapter plugs into your computer; the receiver connects to your Hi-Fi, speakers or headphones using a standard 3.5mm stereo audio or 3.5mm to stereo audio cable. The LINDY Wireless USB Audio Sender is perfect for use with iTunes, Spotify and other streaming audio applications. Now you can share and listen to the music library on your PC, with Hi-Fi quality, at distances of up to 45m - all without any wires! Check out this YouTube video reviewof the Wireless Audio Sender