Shimano SW-R600 Climbing Shifter Switch For Drop Bar - Right HandShimano SW R600 Climbing Shifter Switch For Drop Bar Right Hand With Di2 technology shifting is easy and precise just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear. This climbing twin button satellite shift switch is used to operate the rear derailleur whilst your hands are on the top of the bars, one button up, one button down. Compatible with a range of Shimano E