Selens DBK DF-400 Speedlite Camera Flash for Canon Nikon Sony Panasonic Olympus Fujifilm Pentax Sigma Minolta Leica and Other SLR Digital Cameras S1,S2 wireless trigger Universal flash,low-pressure trigger flash. camera can be trigger the flash tires in the far distance by highly sensitive wireless sensor Standard Canon external power socket supporting your quick flash requirement Super speed of charging recycle.It only takes 3 seconds to finish a charging cycle after a full level output Automatic saving function keep the current setting to the flash light saved