Motor drive cords connect to the camera's remote cable socket, and enable the Pocket Wizard radio slave to trigger the camera's shutter remotely. This pre-trigger cable is designed to keep the camera constantly "awake", and has the same effect as holding the camera's trigger button pressed down half-way. A camera will trigger much faster in the "awake" mode, but will also use up more battery power. However, the pre-trigger mode can be switched on or off from the cable itself. This cable is 3' long, and will trigger Canon T3-type cameras, such as EOS 1N/RS, A2/E, 630 etc.