Shimano SM-EW90-A junction box

Di2 cable junction box

SHIMANO's SM-EW90-A 3-Port A-Junction mounts seamlessly to the bike's stem and connects to the DI2 shifters' E-TUBE wires and downtube junction wire. The SM-EW90 junction box features a built-in battery level indicator, charging port and gear index adjustment switch.

The Shimano EW90 A Case in detail:

• 3-port design, one port for connecting cable between downtube and bottom bracket junction, 2 ports for connecting derailleur shifters. Battery level indicator function.
• Additional charging point when using the internal battery
• Gear indicator installation switch for excellent adjustment through derailleur shifter controls
• Stem mounting strap included
• Reliable and secure water-resistant connectors