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 For either specific frame mount or handlebar end plug mount 2-port design 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