Shimano SC MT9051 Di2 Digital Display Unit

With its SC MT9051 Di2 Digital Display Unit, Shimano ushers its off road electronic groupset into the wireless realm. The SC MT9051 is Bluetooth compatible, so it displays all of the drivetrain information of its wired predecessor, the SC M9050, but without the inconvenience of wired connections. It still enables Synchro Shift, but it now also lets you customize and fine tune the Di2 shifting system wirelessly once again courtesy of its Bluetooth connection. The rapidly evolving world of electronic drivetrains can be confusing, compatibility wise, so we'll help walk you through it. The SC MT9051 is compatible with Shimano's BT DN110 battery. It does also work with the SM BTR2 battery, which is the previous Di2 battery built for the SC M9050, but doing so negates the Bluetooth functionality and eliminates Synchro Shift. Given those limitations, we recommend only pairing it with the BT DN110 battery.