Expand your wireless flash system with this X1R-C TTL Wireless Flash Trigger Receiver from Godox. This 2.4 GHz system is compatible with Canon cameras and flashes that support E-TTL / E-TTL II for automatic exposure and metering, making it an excellent choice for shooters who need to work quickly. It also has an outstanding range of 328′ and can be set to one of 32 channels for limiting interference with other nearby systems. Another huge benefit is the ability to control up to five groups at a time, or set the unit to ratio flash mode for three groups with varying power relative to one another.