The SC-MT800 System Information Display shows you what gear you're in, has a battery level indicator, charging port, synchronized shift mode display and also doubles as a Junction A - it has 3 e-Tube ports for you to connect Di2 components to it. The displays lets you charge the system and also connect to it using Bluetooth and ANT+. It is usually installed on mountain bikes.
If you're thinking of using this display on your road bike to replace your Junction A (SM-EW90 / EW-RS910) and Wireless Unit - you can! Note that you can only have one component with wireless/bluetooth functionality plugged in. If you connect both this and a Wireless Unit the Di2 system won't function.
Synchronized shifting on mountain bikes
If you want to use synchronized shifting on your mountain bike the usual requirements apply - you need either a BT-DN110 battery or BM-DN100 battery mount. You will also need a System Information Display. It is not clear why exactly you need one, but we've asked Shimano and they have confirmed that a display is required for synchro shift on mountain bikes.
Details & specifications
| Shimano model code | SC-MT800 |
| Shimano model name | System Information Display |
| Weight | 30 g |
| Series | XT M8050 |
| Downloads | SC MT800 manual |
| View on | Amazon (new tab) | eBay (new tab) |
Shopping links
Are you looking to upgrade your bike using this component? We've added shoppings links to this component's Amazon and eBay pages. Click the images below to view the Amazon product page or eBay search results.
Shimano also made an XTR version of this component - the XTR SC-M9051. It is identical to the XT version, except for the casing (and price).