YN-622C E-TTL wireless flash trigger is a high-performance master and slave equipment for multi-flash photography, through the 2.4GHz FSK digital radio wireless transmission, and different photographic effects can be realized by adjusting the flash to 360 degrees. Transceiver, remote control distance reaches 100M, supports 7 wireless channels and three A/B/C groups. Remotely change flash modes and parameters quickly when using Canon EOS Series DSLR cameras that support external flash function, such as T TL ratio or manually set each flash output group. Support high speed sync, maximum sync speed is 1/8000s*, supports E-TTL, Manual and Multiple Flash modes. Support E-TTL flash installation on top of transmitter. YN-622C transceiver kit consists of two similar transceivers, supports one camera controlling multiple flashes at the same time. Install the flashes with the additionally purchased receiver to convert them into a form of multi-flash application, the number of receivers is not limited. Compatible with ALL YongNuo/Canon EXII ¼ series flashes and strobe flashes. Compatible with 5D Mark III Compatible with the new Speedlite 600EX RT Flash List Supported ¼ Compatible Flash Mode: E-TTL (II) / Manual/ Multiple Compatibility Shutter Synchronization: 1st Curtain, 2nd Curtain, High Speed Sync (HSS/FP), Max. 1 /8000 s sync speed Remote control of the flash using the camera flash control menu screen (remote control mode) E-TTL support / Manual/ multiple flash mode combination using (mixed control mode) Flash on the transmitter shoe compatible with ETTL compatible Flash Exposure Compensation (FEC) ) Support exposure bracketing