Flash Yongnuo YN560-TX Wireless Controller for Digital Camera Canon 60D 70D 700D 1100D 600D 550D 5D 5DII 5DIII 1Ds 7D LF466 (Electronics)
It changes life, its remote controller flashes, changes life, coupled with 560 IV is just the perfect combo, I totally recommend, a real pleasure to use :)