The Shimano Di2 SM-PCE02 PC interface is essential for efficient troubleshooting of your E-tube SEIS Di2 system. This PC interface connects to any electrical component, allowing for individual component testing and diagnostics directly on your PC. It also facilitates firmware updates through the E-tube software and enables customization of shifting parameters, such as shift speed and multi-shift options, via the E-tube software. It is designed for use with E-tube Di2 systems.