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Shimano DI2 Cockpit Junction Box 3-Port
Mounts under stem or on handlebars
Manages 3 EW-SD50 E-Tube wires
Acts as a charging port
LED battery indicator
Manages 3 EW-SD50 E-Tube wires
Compatible with traditional EW-SD50 cables
3 ports (2 for shifters/1 for main wire)
Not compatible with 12-speed systems using EW-SD300 wiring
