The MusicCast 20 makes your music and movies more enjoyable - maybe in ways you never imagined. its a perfect fit for any space any decor and can even be wall-mounted. Pair two together to create a powerful wireless stereo sound. The MusicCast app makes your MusicCast 20 even more versatile. Add a pair to a MusicCast surround-capable AV receiver to provide wireless Surrounds for a 5. 1-Channel home theater system. Or listen to music in any room in your home with a MusicCast multi-room setup. Voice control with Alexa through any echo device adds more flexibility for your life.