The Phottix wired remote control is a compact remote control that replicates all the functions of the camera shutter button. This remote control makes it easy to take photos with long exposure times. A half press of the shutter button will activate focus, while a full press will trigger the shutter. The shutter button can be locked for shooting in bulb “B”. Very compact, the remote control is extremely robust and light. Cable length: 1 meter Compatible with EOS 10D / 20D / 30D / 40D / 50D / 5D / 5D MK II / 5D MK III / 1D / 1Ds / 1D Mark II / 1D Mark II N / 1Ds Mark II / 1D Mark III / 1Ds Mark III / 1D Mark IV