YONGNUO YN-568EX II, YN568EX II Flash, High speed, Ultra powerful GN master control, Off camera speedlite for Canon Master TTL wireless led flash function, can be as the master unit which support to trigger flash of EX series, 600EX-RT580EX II430EX II and EX series flash. With high-speed sync (FP flash), the YN568EX II can synchronize with all shutter speeds. The maximum shutter synchronous speed is up to 1/8000. One YN568EX II is able to respectively accept internal flashing of YN568EX II, 580EX II, SB-910/900/800/700, 7D/60D/600D, C commander of Ns built-in flashing and ST-E2 wireless signal, achieves off camera TTL and manual flashing. Some beckoning functions such as wireless TTL flashing, grouping light ratio TTL flashing and the illumination of remote controlled flashing can be easily achieved only if you carry a camera with built-in flashing command system and YN568EX II. GN58@ ISO100, 105mm; which reaches the level of the mainstream hot shoe flashes, supports HSS, TTL/M/Multi mode. The YN568EX II can be triggered by the camera set-top, built-in or main-controlled flashing command, S1 and S2 (pre-flash-canceled mode).