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. The derailleur is composed of a mechanical structure with dropout & a series of electronic parts. The outer Derailleur Rod held in place by a double-finned pin that passes all the way through to increase rigidity. The System that links the derailleur to the frame is made from aluminium co-pressed with the engineering polymer of the body of the derailleur. This creates optimal solidity & rigidity ensuring that the derailleur maintains a correct position with respect to the frame. The core of the derailleur is composed of an electronic actuator; in turn composed of a gear motor with a built-in resolver that uses Magnetic Hall Sensor technology (as the sensor is not in contact it is not affected by the vibrations generated by the terrain, & is therefore always precise). The gear motor was developed in partnership with a Swiss company that produces electric motors used in missions to Mars. The actuator is also equipped with a ""cascade gearbox"" which allows movement to be transferred in an exact & rapid manner. 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.