This Multi-Function Timer remote control provides a simple trigger function and can activate the bulb function on cameras. * It also functions as a timer remote and can be programmed to function as an intervalometer. * This remote control with an 90cm cord and a self-timer, interval timer, long-exposure timer, and exposure-count setting feature. * The timer can be set anywhere from 1 sec. to 99 hrs., 59 min., 59 sec. The maximum number of exposure is 399. * Compatible with remote switch model: CANON TC-80N3, for Canon EOS 5D, EOS 1D, EOS 1D Mark II, EOS 1Ds, EOS 1Ds Mark II, EOS 20D, EOS 10D, EOS 40D, EOS 1VEOS 1D Mark III, EOS 50D, EOS 5D Mark II, EOS 5D Mark II, EOS 7D, EOS 1D Mark IV