B00E20KA4K
The EPS Power Unit serves as the systems source of power as well as the "brain" of the system and is responsible for montioring and managing the battery pack, enabling and monitoring the front and rear derailleurs, signaling any anomalies though the LED indicator on the EPS Interface Unit, communicating with the EPS Interface Unit, and enabling the acoustic buzzer.
Campagnolo EPS Athena V2 Power Unit,Campagnolo