Hardly bigger than a Dyna-Lite flash head, the Uni400JR weighs just 3 1/2 lbs.
and packs a 400 watt-second wallop. Plugged into an AC outlet you get a 1.4
second recycle time at full power (400 w/s). Full, half, quarter and eighth
power settings in 1/3 stop steps provide a four f-stop range. Full tracking
quartz modeling light and a built-in slave-eye. Connected to the Jackrabbit high voltage battery pack, the Uni400JR can be
used wherever you go. With a freshly charged pack, you can achieve 75 full-power
(320 w/s), 150 half-power and 300 quarter-power flashes.