for Panasonic/Fujifilm/Canon and Compatible with NA-GH4/NA-XT1/NA-XT2/NA-XH1/NA-XT3/NA-R7/NA-R6II Nauticam flash trigger units allow the use of robust and reliable fiber optic cables to fire external strobes, providing dependable, rapid-fire flash triggering over fiber. Flash triggers allow motor drive shooting sequences, perfect for fast moving action. This flash trigger plugs into the compatible camera hotshoe and provides an optical signal for fast, continuous strobe firing. Automatic TTL flash control is not supported by this flash trigger, flash power is set manually on the strobe itself. Technical Specification Construction: Body: PC+ABS Dimensions: Approx. 60 x 36 x 26.5mm Weight: Approx. 41g (w/ batteries installed) Battery: CR2450 x2pcs Operation: This a manual flash trigger only and has no TTL function. Flash Capacity: Approx. 10000times Compatible housings: NA-GH4 / NA-XT1 / NA-XT2 Compatible strobes: INON: Z240 type 4, D2000 type 4, S2000 Sea&Sea: YS-250, YS-D1, YS-01