This is the Shimano XTR Di2 FD-M9070 Front Derailleur for 2x11 bikes. This model will not work for a 3x setup, you will need the FD-9050 model for triple ring function.
Precision actuators move the cage swiftly and smoothly for fast, silent, accurate front shifts every time. And with single-wire E-tube connection to the rest of the system, the front derailleur is able to automatically trim itself as you shift the rear derailleur, eliminating chain rub.
Features:
Compact size: More lightweight
More powerful shifting than mechanical (+25% compared to M9000)