Trigger flashes from your Canon E-TTL and E-TTL II series cameras wirelessly by using the Yongnuo YN-622 CN Set Version II 2-pack transceiver set. One transceiver directly slides onto a hot shoe and uses a 2.4 GHz frequency with a range of 328 feet for conveniently triggering the remote flashes mounted on the other transceiver. You can utilize both manual and TTL flash modes for complete creative control. In order to setup multiple flash units with ease and efficiency, the transceivers can utilize 3 groups and 7 channels. Lastly, a high-speed sync mode comes in handy whenever a flash is connected via a PC sync port for assisting in bright lighting conditions and providing a high-speed stopping motion at 1/8000 of a second.