Shimano Non-Series Di2 SM-EW90-A E-Tube Di2 Junction-A, 3 Port The Shimano Non-Series Di2 SM-EW90-A E-Tube Di2 Junction-A, 3 Port is designed to enhance your cycling experience by replacing traditional mechanical cables with electrical wires. This change not only prevents issues like contamination, corrosion, and stretching but also ensures smooth and effortless gear shifts. Key Features Essential for connecting shifters to the down tube junction wire using E-tube wires. Features a 5-port design: one port for the down tube wire to the bottom bracket junction and four ports for shifter connections, making it ideal for TT/triathlon setups with multiple shifter positions. Includes a battery level indicator to keep track of power. Offers an additional charging point when using an internal battery. Equipped with a gear index setup switch for precise tuning via shifter buttons. Comes with reliable and secure water-resistant connectors. Includes a stem mounting strap for easy installation. Please note that E-tube EW-SD50 wires are not included with the Shimano Non-Series Di2 SM-EW90-A E-Tube Di2 Junction-A, 3 Port.