Front Derailleur (2x)

The XTR Di2 M9070 Down Swing Front Derailleur features a 25% increased power vs M9000, an optimized Di2 cage profile, improved gear tracking and reliable gear changes even under load. It is meant to be used with two chainrings. The FD-M9050 is the XTR triple front derailleur.

It also supports Shimano Synchronized Shift and computer-controlled auto trim.

Synchronized shift and MTB derailleurs

Want to use MTB derailleurs and also synchronized shift? You need a display in order for synchronized shift to function.

The two displays I recommend are the SC-MT800 display and its more expensive XTR equivalent, the SC-M9051. Functionality-wise, they're exactly the same. It is just the casing that is different.