Shimano resurrects electronic shifting for MTB, but with a caveat
Shimano XT Di2 M8050 1x11 review - BikeRadar
Shimano XT goes electric with wireless Di2 - MBR
First Look: Shimano Brings Electronic Di2 Tech Down to Deore XT, Adds Wireless Connectivity and 11-46 Cassette Option - Mountain Bike Feature - Vital MTB
Shimano XT M8050 Di2 Delivers Precision Trail Performance with Wireless Customization | SHIMANO INFORMATION & NEWS
Shimano XT Di2 Wireless Mountain Bike Shifting Released