Canon EOS Remote Shutter Release - Compatible with Rebel T3/T3i/T1i/T2i, 60D/60Da, 5D Mark II/III, 7D, 1D Mark IV, Kiss X3/X4/X5/X50 DSLR Cameras | USB Focus Control for Time-Lapse & Group Photos | Perfect for Photography, Vlogging & Studio Shooting

I have owned the unit for 4 month. and i didn't even use it for the first 2 month i owned it. In total i have used it in the field 12 times tops. the controller was used in conjunction with my 3 axis gimbal in order to rack focus. The knob that rotates to rack focus has completely locked up. and is completely useless. Granted when the unit was operational it worked great but if you need a unit that is reliable look else where.