Master output: 800W & 4ohm ; USB 2.0 terminal & MP3 LCD display; 5-band graphic EQ; Each channel features tone control & effect control; Aux/SD(TM) Card/USB/effect input & recording output; Channel tone adjust (high/low +/-15dB); Master volume control; 110V-220V switchable; Dim: 7.87H x 12.01W x 20.28D;