Shimano SM-EW90-A 3 Port Di2 Junction Box, top junction box for R8000 and R9150 groups

• The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching, but provides effortless gear shifts
• This junction A is required to connect the shifters via E-tube wires to the down tube junction wire
• 3-port design, one for down tube wire to bottom bracket junction, two for shifter connection
• 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