The AS40D is a compact portable 4 channel light dimmer. It has a maximum capacity of 600W per channel and a maximum total load capacity of 2400W. It is supplied with an input power cord which may be connected to a 120 VAC, 20A power circuit. The unit operates using the USITT DMX-512 protocol. The AS40D may be operated in a relay (non-dim) mode. The unit will also function as a stand-alone chaser and has eight primary preset chase patterns which may be used.