SHIMANO's SM-EW90-A 3-port A junction box is carefully mounted on the bike's handlebar stem and is connected to the E-TUBE cables of the DI2 shift controls and the down tube junction wire.
The SM-EW90 junction box has an integrated battery level indicator, charging port, and gear indexing adjustment switch.
Electric wire category: Under mount
Compatible electric wire: EW-SD50
Firmware updated by E-TUBE Project: X
Port for remote sprinter shifter (Qty): 0
Charging port (pcs.): 1
E-TUBE port (Qty): 3
E-TUBE connector (Qty): 0
Connector for remote sprinter shifter (Qty): 0
Location: Under stem
Type: External type
Compatible system: E-TUBE
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