SHIMANO - Junction A - E-TUBE - Under Stem Mount - 3-Port

SHIMANO's SM-EW90-A 3-port Junction A mounts neatly to the bike stem and connects with E-TUBE wires from DI2 shifters and the downtube junction wire. The SM-EW90 junction box features an integrated battery level indicator, charging port, and gear index setup switch.

This specs are from the information each brand releases and may change without previous notifications.