Shimano Di2 Junction Box (A) SM-EW90-B

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Top Features of the Shimano Di2 Junction Box (A) SM-EW90-B

This junction A is required to connect the shifters via E-tube wires to the down tube junction wire
Battery level indicator feature
E-tube EW-SD50 wires not included
Additional charging point when using internal battery
Gear index setup switch to allow fine tuning via shifter buttons
Reliable and secure water resistant connectors
Stem mounting strap included