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). Precise shifting is fluid, efficient and reliable no matter the pedaling conditions Thanks to the Position Sensor, the gear positions itself automatically in the best point for the selected sprocket Batteries recharge fully in just 60 minutes, with charge levels easily monitored via component LEDs or the MyCampy 3.0 app Removable battery is easy to charge thanks to quick-snap magnetic ports (battery sold separate) Manual gear UnLock System allows you to move the gear manually to your preferred position in the event of a system malfunction and can also be locked back with the upward shifting lever during use Specifications Largest Cog32Rear Derailleur Mount Type10x1 StandardDrivetrain Speeds12Chain Wrap Capacity (teeth)37Cage LengthShortColorBlackWeight269