The Shimano SM-PCE02 Di2 PC E-Tube Linkage Device is a must-have tool for any cyclist using a Di2 electronic shifting system. This device allows you to connect your Di2 system to a PC for customization, firmware updates, and system diagnostics. Compatible with the E-Tube Project software, this linkage device comes with a USB cable, link cable, and all necessary connectors for easy use. Keep your Di2 system up to date and running smoothly with the Shimano SM-PCE02 Di2 PC E-Tube Linkage Device.