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 gearKey Features:The removal of traditional mechanical cables in favour of electrical wires eliminates poor shifting caused by contaminates, corrosion and stretching, and also provides effortless gear shifts.Single button on each side of the shift lever only works with synchronized shifting.Simply pressing tactile buttons allows effortless and comfortable shifting even when your hands are cold.Shifters are lightweight thanks to carbon fibre lever blades, carbon composite bracket body, and alloy expanding wedge clamp.TT / Triathlon bar STI allows shifting while braking and can be used with additional bar end switches.Brake lever pivot is positioned to be used with super SLR brake callipers.Finely tuneable reach adjusters for the levers enable custom fitment for all hands.Levers are supplied without electrical cables, as these need to be ordered separately to suit.For use with E-tube electric cables.Comes complete with SLR brake cable set.