Multiple shift modes, like hold-down multi-shift and 2-step multi-shift, offer versatility and precision, while the tactile click prevents mis-shifts and a tunable third button allows for additional system tuning or third-party connection.Key Features:·Ergonomic EvolutionFamiliar fit and multi-axis adjustability make this Shimanos most natural-feeling shifter yet.·Fast Action Precise, lightning-quick wireless shifting activated by Shimanos most adjustable, customizable, and satisfyingly tactile shifting switch.·Finely Tuned Assign a function to the programmable third button through the E-TUBE PROJECT app, with full switch and e-bike customization.·Feature Rich Short stroke paddles, a two-step double shift or hold multi-shift, rubber traction pad and I-SPEC EV clamp band, all in a tidy, ergonomic package.