Aputure V-Control - USB Focus Remote Controller for Canon EOS 1D Mark IV, 5D Mark III, 5D Mark II, 7D, 60D, 600D/T3i/Kiss X5, 550D/T2i/Kiss X4, 500D/T1i/Kiss X3, 1100D/T3/Kiss X50, Follow Focusing, Select Focusing Worlds 1st mode-switching USB focus device Total exposure control (shutter, aperture, ISO, EC), Total live-view control Compatible with many accessories, LCD display for adjustment settings Multiple focus options in still mode, Four focus point presets in video mode Two USB ports for ergonomic flexibility, Simple operation & easy portability