Shimano E-Tube EW90 Di2 Junction A Box

The Shimano SM-EW90 junction box connects via EW-SD50 wires to different points on your bicycle. Also used with Shimano SM-BCR2 battery charger to charge the SM-BTR2 without removing internal battery.

• 3-port design - one for downtube wire to bottom bracket junction, two for shifter connection
• 5-port design - one for downtube wire to bottom bracket junction, 4 for shifter connection allowing the addition of TT shifters.
• 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