Multi 5 in 1 wireless trigger system which gives photographers incredible control over their flashguns and studio lights four channels and four groups provide unparalleled control in the studio or on location the strato ii multi can be used as a wired or wireless shutter release the 24 ghz transmitter and receivers offer ranges of more than 150 meters and sync speeds of up to 1250 second transmitters feature an innovative ttl pass through hot shoe allowing full ttl mode to be used with