Shift up or down by 11 sprockets in under 1.5 seconds! This astonishing performance has only been made possible through the relentless pursuit of perfection in every part of the component. Every single detail has been optimised to strike the perfect balance between lightness & stiffness, for maximum shifting speed & precision. FEATURES & BENEFITS HIGH TORQUE, HIGH DRIVE RATIO MOTORS: Campagnolo has used the world's best electric motors for this application. These units ensure effective shifting even under strain, deliver the same performance time after time & make extremely fast, precise shifts possible. POSITION SENSOR: the " Magnetic Hall Sensor Resolver™" ensures that the rear derailleur always moves the chain into the ideal position for the selected sprocket. UPPER & LOWER BODY IN MONOLITHIC CARBON POWDER TECHNOPOLYMER: for maximum lightness & superlative stiffness. FRONT ROCKER & LINK IN CARBON FIBRE: the only electronic rear derailleur in the world made from carbon fibre. For maximum lightness & superlative maximum stiffness. For fast, precise shifts even under strain. EXCLUSIVE "BACK HOME" SYSTEM: the manual release system lets the user position the rear derailleur & chain on the desired sprocket in the event of a drivetrain malfunction. The release system also prevents damage to the unit in a fall. EXCLUSIVE MULTI-SHIFTING SYSTEM: lets the rider shift up or down by up to 11 sprockets in a single action! 100% WATERPROOF: all the components of the rear derailleur are built to operate in any weather conditions in compliance with the IP67 standard.