The Priolite Bonn M500 2-Light Kit is built around the 500W/s M500 AC powered flash head. The kit includes two M500s, a 39" umbrella, a 27.5 x 39" softbox, two 8.2' heavy-duty light stands and a wheeled Trolley Case. The M500 uses a power supply with PFC (Power Factor Correction) that not only prevents power spikes during recycling but allows the flash head to recycle at 1.0 seconds to full power and fire 6 times per second at minimum power.
If you need to stop action the M500 offers very short flash durations of 1/15,000 to 1/4,500 sec. Triggering options include an optical slave and a built-in radio receiver in each head with a remote range of up to 984'. Separate purchase of the Remote Radio Control is required for use of the receiver. Other conveniences include multi-voltage operation, Bowens S-type mount compatibility and a 5.0 stop power range.