Dedicated to the Interfit S1-series of monolights, this S1 TTL Remote permits wireless TTL control over the light when working with Canon cameras. It supports the Canon E-TTL II protocol and permits working with three distinct groups (A,B, and C) for creative flexibility and greater control over lighting ratios. The remote is designed to be mounted via the camera's hot shoe and enables control over the S1 monolights from up to 300' away. Users will appreciate features such as control of audible recycle beep and LED modeling lamp, and sync speeds up to 1/8000 second.