Here are the details of the Shimano STEPS EW-EN100 Junction-A Kit - One Size Black. For a simple, clean cockpit, the EN100 E-Tube connection provides a minimal display and wireless communication to 3rd party displays and smartphone applications. Assist mode (w/o cycle computer): HIGH, NORM, ECO, OFF, WALK Expanded communication by wireless connectivity: Minimal display option for a simpler cockpit, Wireless connection with 3rd party displays and smartphone applications, Support for clean cockpit area, D-FLY Technologies: D-FLY: D-FLY is a wireless data transmitter that easily connects DI2 and SHIMANO STEPS rider performance data with E-TUBE compatible cycle computers. Advanced wireless communication supports a more streamlined and seamless cycling lifestyle. Easier and more convenient wireless connectivity enhances communication between riders and their bikes. E-Tube: The E-TUBE platform's “Plug & play” and D-FLY wireless connections make it easier than ever to check the system's status, and apply customized settings to DI2 and SHIMANO STEPS components with a PC, tablet or smart phone. Wirelessly customize functions like SHIMANO SYNCHRONIZED SHIFT over Bluetooth® while out on a ride. Automatically checks for firmware updates on each startup to ensure all components are running the latest version. PC, smartphone and tablet applications can help you quickly diagnose errors and simplify the repair process. Beautiful visualization of your real-time SHIMANO STEPS riding data on your smartphone. Advanced all-weather design resists rusting, stretching, and freezing.