FlashMaster provides quality lighting for school and portrait photography. The rugged construction provides durability whether you're on the go or in your studio. The FlashMaster's power distribution system has up to a four-light capacity. Features: 600ws 5 head outlets (4 with low voltage, 12v/25watt, and 1 with high voltage, 120v/150 watt.) Full or 1/2 power setting Color balanced Consistent power output 3 second recycle at full Ratio plug system distribution Asymmetrical and Symmetrical plug adjustment Ready Light Photo cell/slave Synchronization jack Test Fire button Voltage Stabilized Circuit overload protection Internal thermal protection Quick-Change accessory system on Advantage heads High Impact metal housing Auto discharge function Audible misfire alarm Click here to download the Flashmaster manual.