Item DescriptionExclusively for Campagnolo EPS, Electronic Power Shift, electronic shifting systemsThe Power Unit is the brain of the entire EPS systemThe Power Unit checks and manages the battery pack, interacts with the Interface, drives the front and rear derailleurs and displays system anomalies through an acoustic buzzer and RGD lightPower Unit also contains the battery which is a rechargeable Lithuim Ion 3 series cell, encased in a fireproof thermoplastic housingThe Power Unit input/output gate charges the battery and updates the firmware Power Unit does require a holder either the standard, CP-93263, or the non-standard and a cable kit, CP-9326*Super Record/Record model is not compatible with the Athena modelItem Specificationsmodel: Athenadescription: EPS Power Unit: