RF Yongnuo 603 II / C1 (Version II) 2.4GHz for wireless flash triggers Cable for Canon 60D, 70D, 350D, 450D, 500D, 600D, 650D, 700D (Electronics)
purchase to make eyes closed, a big plus compared to the old version with the on / off button on the side instead of top, it's beast but it avoids removing the flashes and return them for turn off and on, something else, be careful and between c3 c1