SW2150B/2200B/2300B 6MIC inputs and 6 line output,each channel with zoning volume controllers Build in MP3/SD card with digital processor Main volume control and zoning volume controllers Over current and short circuit protection Over heating and DC offset protection Output:100V/70V 4-16ohms with 4 zoing volume controllers Power supply:AC 115V/230V POWER OUTPUT: SW2150B 150W SW2200B 200W SW2300B 300W