YONGNUO Remote Cord MC-36 / C3 for Canon EOS IV, 3, D3O and D60 EOS 1D, 1DS and 1DSMK2 EOS 10D, 20D, 30D, 40D,50D,50DII,7D and 5D Delay: set time 0s 99h 59m 59s for counting down and thenrelease shutter Long : set exposure time exposure time exactly in B model 0s 99h 59m 59s Intvl : set time 0s 99h 59m 59s from the time from the firstrelease to the second time, including the exposure time of each shooting N : set totle shooting times(1-399)