Shimano RS910 Di2 Drop Handlebar/Internal Frame Junction Box Returned Item

The Shimano Di2 Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount

• All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
• Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/

This item was returned and may not have the original packaging, or show signs of install. These items are still perfectly functional and ready to be used!