Wireless Radio Remote Flash Trigger 1 Transmitter + 4 Receivers for Canon EOS 450D, 1000D, 550D, 400D, 500D, 350D, Xsi, T1i, T2i, Xti, XS, XT, 50D, 40D, 10D, 20D, 7D, 5D Mark II, 1D Mark II, III, IV, 1Ds