interfaccia interna campagnolo eps v4 12x2vL'Campagnolo EPS V4 12x2v Internal Interface connects the various parts of the groupset, including the shifters with the front and rear derailleurs. The interface also allows you to see how much battery time remains. The V4 version not only receives electronic signals and communicates them to the front and rear derailleurs, but it is also capable, thanks to its two internal antennas equipped with Bluetooth Low Energy and ANT Plus, of communicating in