Camkitmate Remote Switch Shutter Release Control Cord For Canon 10D 20D 30D 40D 6D 7D 1D Mark II III Camera 3M This shutter is very simple to use, just plug and Use. It can help Preventing vibration during long exposures, close up or continuous shooting. It is a perfect stuff to use during taking time-lapse photography and long time exposure. 2 stages release button: Halfway pressed button - For auto-focus and exposure metering Shutter release button lock - For long exposures shooting and continuous shooting Important information: Color:Black Cord Length :approx 3 meter Compatible: Canon 1D /1D Mark II III / 1DS / 1Ds Mark II / 5D MK II III / 1V / 1VHS / EOS 3 / 7D / 6D / 10D / 20D / 30D / 40D / D30 / D60 etc Packaged come with: Remote Shutter Release x 1