Ideal for medium to large rooms such as dining rooms, larger bedrooms and offices or smaller living rooms. This beautifully styled middle sized speaker plays cloud music, music stored on your phone or tablet, plus USB and NAS sources, too. Now you can even listen to your favorite Bluetooth enabled sources on your HEOS system. Be greedy, you're covered. It also features a well-crafted blend of four custom drivers, one radiator and four Class-D amplifiers, all of which are controlled with state-of-the-art- digital signal processing, born in the studio. Translated from the tech: Really smart people engineered these medium speakers with really cool components, and you will hear it in every beat.