The brain of the system, Dti (Digital Tech Intelligence), as well as the battery pack, are inside the Power Unit, the system's source of power. This is the heart, brain & the "right hand" (this controls the motors & their operating power) of Campagnolo electronic drivetrain. The main functions of the Dti are:monitoring & managing the battery packenabling & monitoring the front & rear derailleursignalling any anomalies through the rgb ledcommunicating with the interfaceenabling the acoustic buzzer Once it has received digital signals from the interface, the Power Unit processes them through a special algorithm & translates them into movement of the rear derailleur & derailleur. The Dti, Digital Tech Intelligence, which is housed inside the Power Unit, continuously monitors the signals that arrive from the interface & the rear derailleur & derailleur, thus managing their operation. The Power Unit, along with the interface, also acts as the diagnostic centre of the system, signalling any anomalies in the system through an rgb led & an acoustic buzzer placed in the Power Unit. The electronics of the system are housed inside the Power Unit. This strategic choice allowed us to make the system less vulnerable to external agents (such as oil, water, mud & dust) & make it stable even when subjected to significant vibrations, such as those generated by professional athletes on the road of classic north routes. This way any errors in the system are dramatically limited & the system is guaranteed to function even in extreme conditions, be it weather, be it terrain. In particular, the special case housing the Battery Pack has been produced in a self-extinguishing plastic material.