This remote switch come with a 2.6' (80cm) cord to prevent camera shake for super telephoto shots, macrophotography and bulb exposures. The remote switch works just like a shutter button, enabling halfway or complete pressing. It also has a shutter-release lock. Its quick-lock plug connects to the EOS-3's remote control socket.Weight: 1.9 oz. (53.8g)For use with the Canon D2000, EOS 1V/1V HS, EOS 3, EOS-1D, EOS-1DS, 1D Mark II, 1Ds Mark II/IIN, D30, D60, 10D, 20D & 30D.