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 shiftsThis junction A is required to connect the shifters via E-tube wires to the down tube junction wire3-port design, one for down tube wire to bottom bracket junction, two for shifter connectionBattery level indicator featureE-tube EW-SD50 wires not includedAdditional charging point when using internal batteryGear index setup switch to allow fine tuning via shifter buttonsReliable and secure water resistant connectorsStem mounting strap included