Shimano Di2 Cockpit Junction Box

Shimano Di2 Junction Box

- 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/
- SM-EW90-A 3-Port Cockpit Junction Box connects 1 pair of Di2 shifters to the frame junction box via 3 SD50 E-tube wires
- OEM front wiring kit for Dura-Ace Di2 9070
- LED battery charge level indicator
- Rear Derailleur adjustment mode