This Dynalite MP400 400W/s RoadMax Power Pack is powerful and versatile enough to handle a wide variety of on-the-run assignments like fashion, corporate work, portraiture, weddings and interiors. The pack has 4 head outlets and breaks down its output symmetrically or asymmetrically over a 6 stop range with short flash durations at a super fast 1.0 seconds recycling time at full power. A variator knob allows fine tuned exposure adjustments over 2 stops in 2/10 stop increments. Triggering options include sync cord (provided), IR or optical slave as well as a built in PocketWizard 32 Channel Transceiver.
Although you may be tired at the end of a long shooting day, it won't be because of your equipment. The MP400 pack weighs 4.2 lb (1.9 kg) and measures 5.87 x 6.87 x 5.25" (14.9 x 17.4 x 13.3 cm). That's a lot of power in a small package.