400W max; 100W max x 4 max; Waterproof; Variable-input gain control ; High/low level input ; Remote turn on/off ; Speaker output connector ; Gold-plated RCA inputs ; Thermal, overload & speaker-short protection; Heavy-duty aluminum-alloy heat sink; Includes mounting screws & hardware; Weight: 3.3lbs; Dim: 2″H x 8″W x 7.87″D;