100-watt integrated class D amplifier and pre-amp audio outputs for easy connection to powered subwoofer, Local audio input to play the local music or tv using the amplifier and speakers in the room Input for compatibility with Channel Vision"s Crescendo CAT5 audio systemsBalance control for L and R speakers, Keypad volume, remote control and source selection inputPower saving audio sensed circuit automatically re-energizes the amplifier when audio is presentExternal power supply included