Shimano Di2 3-Port External Connection Box SM-EW90-A

External connection housing Shimano Di2 3 SM-EW90-A ports plugs under the gallows of the bike and connects to the wires of the Di2 speed change controls and to the junction wire of the lower tube.
It is useful in case of breakdown to enjoy the transmission without having to buy the whole system.
It incorporates a level battery charge indicator and a gear index adjustment switch.

Detailed specifications of the external connection housing Shimano Di2 3 SM-EW90-A ports:

• Versions: 3 ports
• Weight 11 g
• Compatibility : Dura-Ace Di2 9070 / Ultegra Di2 6870