Shimano r785 di2 2x11 speed sti shifterwith 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 featuresthe removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates corrosion and stretching and also provides effortless gear shiftssimply pressing tactile buttons allows effortless and comfortable shifting