The Super Record S Wireless rear derailleur makes the most of Campagnolo state-of-the-art technology to guarantee maximum shifting performance. Thanks to in-depth technical knowhow, the Campagnolo Super Record S Wireless rear derailleur always recognizes the sprocket being used in order to guarantee maximum shifting accuracy. This perfect alignment also provides the cyclist with the best power transfer and reduced chain wear. Developed with a User-Centric Design in mind, the Super Record S Wireless rear derailleur is teamed with a battery delivering an autonomy of over 750 km (battery sold separate).