In mix mode, several flash units can be operated simultaneously in E-TTL as well as in manual mode. Through the E-TTL pass-through mode, the TTL signal can be looped through to a flash on the transmitter on the camera. The X1R-C supports 32 channels in five groups. The camera menu allows you to control the power of the flashes on compatible devices. This makes it easy to change the setting of the flashes without going back and forth. With the high-speed synchronization you control the shutter speed over normal usual time from 1 | 250s up to 1 | 8000s. Make great photos in bright sunlight, catch daring fast movements or hide the daylight almost completely. This function is also possible on studio flashes to operate the X1R-C on a studio flash or Porty, PC sync cable is already included. All modes such as E-TTL, manual and also multi or strobe flash are supported. The triggering can be synchronized to either the first or second shutter curtain.