FSK 2.4GHZ Wireless System * Over 100 meters Operation Range * Max to 1/8000s sync speed * With PC socket control the studio light also support 1/8000s sync speed. * (1)King receiver compatible with: Canon EOS 580EX II, 580EX, 430EX II, 430EX, 320EX II, 270EX II, 220EX II Flash, Metz flash, Sigma flash, Sunpak flash, Nissin flash, Studio and outdoor flash. (2)Support external flash control in camera menu: CANON EOS 600D,1100D, 550D, 500D, 450D, 1000D, CANON EOS Rebel T3i, T3, T2i,T1i,XSi,XS, CANON EOS 7D, 60D, 50D, 40D, CANON EOS 5D Mark II, 1D Mark III, 1D Mark IV, 1Ds Mark III, this function can be controlled the flash directly from camera menu. (3) Support camera external flash control flashgun: Canon 580EX II, 430EX II, 320EX, 270EX, Metz AF-48, AF-50, AF-58. (4) Using non compatible with menu setting camera model as below: Canon 10D, 20D, 30D, 5D, 300D, 1D, 1D Mark II, above camera model do not have external flash function setting in camera menu; you can only set the channel and group on transmitter.