Shimano AD305 Conversion AdapterThe AD305 Conversion Adapter from Shimano is compatible with the Shimano Steps system for connecting the electric wire SD300 to the current SD50 wire system. And it's compatible with the Shimano E-Tube electronic drivetrain systems.Shimano E-Tube OptimisedE-Tube is Shimano's “service” that uses websites or apps to maximize the enjoyment of riding a bicycle by connecting the riders, the bicycles and Shimano. Shimano's genuine application E-Tube Project for Mobile allows you to customize your bike, update firmware, and maintain it by connecting it wirelessly to your bike. You can also get more detailed bike maintenance by connecting to your bike by wire with E-Tube Project via the Windows V4 application.Features: Shimano Steps - Wire Conversion Adaptor Electric Wire SD300/SD50 Conversion Adaptor Series: EP8 EP800 Series Part Number: EW-AD305A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.