The Speedotron D1604 1600 Watt/Second Power Supply is a high-quality power supply designed for flash lighting setups. With a power output of 1600 W, this AC-powered unit is perfect for powering multiple flash heads units, with up to 4 flash heads connected via plug slave/flash connection. The Brown Series design and fan-cooled feature make it a portable and reliable option for professional photographers in need of a powerful and efficient lighting solution. Its test button flash head trigger also adds convenience to the overall setup.