Yongnuo's new radio ETTL flash trigger YN-622C offers automatic exposure metering TTL without the need of a line of sight between camera and flashes. Typically radio triggers offer a maximum range of up to 100m under best circumstances.The YN-622 supports TTL, manual flash mode, 3 channels and 3 groups, high speed sync (HSS) up to 1/8000s, automatic zoom, exposure compensation, AF assist beam, PC sync and a lot more. The radio trigger offers a function called hypersync that allows shorter sync speeds even with studio flashes or other manual flashes. The new YN-622 fits perfectly in the Yongnuo product line and will be first available for Canon DSLR. Compatible to all flashes by Yongnuo and Canon's EX II flashes.