Features of the SRAM RED eTap AXS Electronic Road Groupset Groupset includes all electronic components for a 1x setup in a single package-cable brake/shift lever pair, rear derailleur, battery, charger and cord, and quick start guide For use with mechanical rim brakes Sram Red eTap AXS brake/shift levers seamlessly connect you with your bike by offering classic eTap shift logic with an updated ability to connect and personalize through the Sram AXS app Red eTap AXS rear derailleur Features orbit chain management Technology to keep the drivetrain quiet and secure, and is enabled with Sram AXS for easy personalization Rear derailleur includes optimized motor and signal travel for faster shifting, and is compatible with existing eTap batteries To complete your groupset, purchase a crank, bottom bracket, cassette, chain, and brakes