Professional DJ 2200W power amplifier includes dual output level controls & illuminationAmplifier features protection circuit & indicatorSound system boasts dual-color LED output level displayStereo/mono/bridge selectorDual RCA & XLR-.25″ combo inputsAC power supply inletStereo or bridged power into 4? or 8?2 speaker connections via banana plugsHeavy-duty fan cooling & aluminum heatsinkGround lift-switch110V 220V selector