Campagnolo EPS Interface

A tiny electronic component that performs an extremely important job.

The interface transforms the analogue signals received from the controls into the digital signals transmitted to the EPS™ Power Unit™.

But that's not all it does. It is also used to sets the initial configuration and adjust drivetrain settings during a race, as well as displaying battery level.
A vital component for the electronic drivetrain, it may be installed on the handlebar mount or on the brake cables.