The Cable Release mode is the basic mode to trigger your camera or flash. It does not have any parameter. The moment you touch the button, MIOPS Smart+ will trigger your camera for the duration of the pulse length. If your camera is in bulb mode, the shutter will stay open as long as the duration of the pulse. Otherwise, the exposure of the camera settings will be valid.
Also, you can focus your camera by pressing the Auto Focus button. It will keep your camera focusing as long as you press the button.