... system, 20 channels, professional stage light, have high quality and best price amplifier speaker,professional sound systemVoltage: AC110V-130V,220V-240V ... correction function.Sound control: sound-active in phase .Optical System: linear focus- adjustable lens, 1 rotating 3-facet ... automatically when the machine is over heated or the system starts to malfunction Signal Control: Signal DMX512 Channels ...