The Voking VK581C Speedlight - Canon, DSLR Cameras with High Speed Sync is an high output flash unit auto compatible with i-TTL and TTL auto flash. It serves as an on-camera flash at the same time a master unit or a slave unit in a wireless multiple-speedlight system. It comes with high speed sync enable shutter speed up to 1/8000.
|TTL Dedication||TTL, Manual, Multi, Master, Slave|
|Power Source||AA size batteries
(Alkaline or Ni-MH are usable) x4
|Flash Control||8 levels of output control (1/128~1/1), 22 levels of fine tuning|
|Wireless Communication Channels||4|
|Controllable slave groups||A, B, C|