The Hähnel Combi TF is a remote control and remote flash trigger system that enables wireless control of the camera’s shutter release, auto focus, continuous shooting, bulb mode, and 4-second timer delay trigger.The Hähnel Combi TF is a remote control and remote flash trigger system that enables wireless control of the camera’s shutter release, auto focus, continuous shooting, bulb mode, and 4-second timer delay trigger.