EboxDeal Shanny Master Flash SN600SC High speed Sync 1/8000s GN62 Flashgun Speedlite for Canon 1100D, 1200D,550D, 500D/T1i,350D, 600D,650D,700D,60D,70D,7D ,7DII,6D,5D II,5DIII Flash mode: TTL/ M/Mult with Guide Number: GN62(ISO100,200mm) Wireless Flash: Optical transmission Master/Slave, Radio transmission Slave supporting the access to the Canon menu Trigger mode: Set-top flash, optical transmission, radio transmission, light trigger Flash control: 8 levels of output control (1/128~1/1), 22 levels of fine tuning Automatic zoom functions, flash zoom position can be back and forth with the change of the focal length of the lens