The XMTRN Flash Trigger for Nikon from Bowens is a 32-channel / 5-group
transmitter designed to fire Bowens's recently introduced
battery-powered, TTL XMT500 flash head. The full-function trigger
supports full TTL exposure control, power level, modeling light, flash
ready indicators and channel selection from distances up to 260'. Sync
functions such as rear curtain sync, sync delay and High Speed Sync up
to 1/8000 sec are also wirelessly controllable. The flash trigger
operates on the 2.4GHz frequency and is powered by 2 AAA batteries.