The Shimano Ultegra Di2 6870 11 speed shifters are compared to their predecessors changed completely. With thinner, slimmer hoods these 11-speed shifters increase ergonomics in every position and ensure more comfort and control.
With the previous Di2 version it wasn't possible to shift multiple sprockets upwards, but this is now possible by just holding the shift button. By adding the PC interface it is possible to set up your shifters in the opposite position, you can shift your rear derailleur with your left lever. Shimano shifters are prepared for additional shift buttons. Each Ultegra shifter has 3 ports for placing cables. One plug goes into the direction of the main box thats located under your handlebar, the other two can be used, for example as sprint buttons, which you can place anywhere you prefer on your bike.