The Campagnolo Eps drivetrain is an organic set of mechanical & electronic components that work together in an integrated way to guarantee maximum performance. In particular, the Eps derailleur interacts with the mechanical crank set & enhances the elevated derailleur speed & precision made possible with X.p.s.s. technology. The 8 special upward zones & 2 downward zones for the chainrings associated to the speed & precision of the new Eps derailleur guarantee top performance.AUTOMATIC Correction: Compared to the traditional mechanical derailleur that could be adjusted with micro displacements made by acting on the levers manually, the Eps derailleur is equipped with a very sophisticated electronic Automatic Position Correction system.DTI: Digital Tech Intelligence is housed inside the Power Unit & it continuously monitors the signals that arrive from all the Eps components, thus managing their operation.WATER Proof: In order to achieve the Ip 67 classification, all the electronic components of the Eps system underwent a series of tests, which proved their ability to function perfectly under one meter of water for at least 30 minutes.