PLEASE BE ADVISED THAT THIS MODEL NEEDS TO BE PRE-ORDERED AND HAS AN ORDER LEAD-TIME OF APPROXIMATELY 2-4 WORKING DAYS. The Mode button sets the mode and the Jog dial sets the time or number of exposures. Functions include: Self-timer Intervalometer Long-release timer (for Bulb exposure) Number of exposures per cycle Compatible Products: EOS 10D EOS 1D Mark II N EOS 1V EOS 20D EOS 20Da EOS 3 EOS 30D EOS 40D EOS 5D EOS D30 EOS D60 EOS-1D EOS-1D MARK II EOS-1D Mark III EOS-1Ds EOS-1Ds MARK II EOS-1Ds Mark III