Shimano SM-PCE02 Di2 E-Tube PC Linkage DeviceShimano's SM-PCE02 PC Linkage Device for DI2 groups is used to check system functions, connections, and errors as well as update firmware and customise functions. The SM-PCE02 connects through a Micro USB port.FeaturesImproved the quality for the communication against noiseEasy checking function for current leakageIncludes cables