ST-E3-RT Speedlite Transmitter
Fire compatible Speedlite flashguns over distances of up to 30m. Radio-frequency control provides reliable operation even when direct line of sight is not possible.
Canon 5743B003, AA, 67,4 mm, 77,4 mm, 61,5 mm, 110 g
Canon 5743B003. Battery type: AA. Width: 67,4 mm, Depth: 77,4 mm, Height: 61,5 mm