Di2 SM-EW90-A Junction

The Shimano Di2 SM-EW90-A Junction serves as an interface between cockpit and Junction B. Three ports allow for a classic connection to Di2 STI shift/brake levers.
For triathlon bikes, we recommend you to use an SM-EW90-B Junction with five ports.

Three E-Tube ports
Compatible cable unit: EW-SD50
Position: under stem
Charging socket for internal battery & firmware updates

In the box: SM-EW90-A Junction incl. mounting strap and clip

Compatibility:
All Shimano Di2 systems except Dura Ace 7970. Ultegra 6770 systems may also be used after removal of the SM-EW67-A-E unit (two additional EW-SD50 cable units for connection to the STI required).