Aputure WTR3C Pro Coworker 4 in 1 2.4G Wireless and Wire Shutter Release Timer Remote for Canon EOS 1D Mark IV, 1D(s) Mark III, 1D Mark III, 5D Mark III, 5D Mark II, 1D(s) Mark II,1D Mark II(N), 1D Mark II,50D, 40D, 30D, 20D, 10D, 7D, 5D,1DX,1D C,1Ds, 1D, 1V, EOS 3,D2000