The NERO MAX8 is a highly efficient Class D multi-channel audio distribution system that powers up to four zones with up to six different sources for well-rounded and easy-to-manage residential and commercial audio systems. This multi-functional and highly compatible and expandable amplifier is engineered with cutting-edge features including full control from iOS and Android devices. The free App duplicates the optional control keypads and allows you to select zones, adjust volume, treble and bass, or turn all zones on or off directly through a smartphone or tablet.