This release cable works as an extension of your shutter release button, preventing camera shake on long telephoto, macro, and long exposures.  Shutter release lock so you don't have to hold the button down for bulb exposures.  2.6 feet long.

Compatible with:
EOS-1V/1VHS, EOS-3, EOS-D2000, D30, D60, 1D, 1Ds, EOS-1D Mark II, 10D, 20D, 30D, 40D, 5D