The Stage Wash 1550 from Chauvet is a 2- 4 channel DMX-512 RGB color wash fixture with 4 operating modes: RGB Mode: Full RGB mix plus dimmer (4 channels), C&B Mode: Color selection (40 presets) & dimmer (2 channels), RGB & Chase Mode: 7 distinct operating modes (4 channels), RGB mix. Stage Wash 1550 Features:8-pattern auto, 8-pattern sound, auto-chase, sound-chase, 40-color auto or sound1,500 watts of total brightnessBuilt in beat-activated and automatic programs (stand-alone)Barn doorsSound sensitivity knobLinkable via master/slaveFan cooled