The Remote Transmitter from Bolt is an advanced 16-channel, 16-group radio triggering device that can fire your compatible remote flash at sync speeds up to 1/250 sec. at distances up to 150' as well as control its power level.
Compatible with the Bolt VB-11 and VB-22 flash heads, the 433 MHz transmitter can raise and lower the power of the slave flash in 1/10 or 1/3-stop increments as well as turn modeling lights and audio alerts on and off. It's also capable of turning the AF assist on or off on flash units that have this feature. It is also compatible with Interfit Strobies flash heads. The transmitter runs on 2 AA batteries and works with the separately-purchased RR-16-A receiver which is powered by the host slave flash. The transmitter can also be used as a handheld central remote controller to adjust the settings on the lights mentioned above, even if you use a different device or method to trigger them.