The Chromecast Audio Digital Media Streamer amplifies your audio via Wi-Fi with lossless high-resolution sound, which offers a high-quality listening experience. As you scroll through your playlists, you'll see a Cast button that will instantly begin streaming your songs through your external audio system to immerse you in sound. The smooth streaming of the Chromecast is skip-free, with audio performance that's detailed, rich, and dynamic. The streamer works with a variety of popular music apps, including Spotify, Pandora, and Google Play. The multi-room feature lets you hear your music from anywhere, continuously, and enjoy letting your mobile phone do double duty as a remote that helps you select what songs to play. The device connects easily for use in seconds via an included cable to the AUX input on any stereo, or you can use a TOSLINK (digital optical) cable to connect to a DAC. This was, since it's no longer manufactured, a superb way to convert any existing audio system for painless audio streaming. While used, this device is in excellent condition and has been restored to factory settings.