SoundTouch, a key benefit to this Lifestyle system, is made to grow with you. Once you have one SoundTouch system, you can add more at anytime. They all work together. So as you go room to room, your music goes along with you. The free SoundTouch app gives you greater control of your Lifestyle system—any SoundTouch product, actually—from a smartphone or tablet. Use it to browse music, and control that music throughout your home. Start streaming instantly, or use the app to personalize the presets to your favorite music and stations. You can also use the universal remote’s SoundTouch LED to see what songs you’re listening to, a nice feature when you switch directly from a movie to some music.