All-new XC focused and trail ready derailleur that�s specifically designed and optimized to be motor-driven instead of cable-actuated Instantaneous shifts from a single touch even while under World Cup-winning chain loads Eagle AXS is designed to work with X-DOME Eagle cassettes only, providing the most precise, silent, and reliable shift performance available AXS powered components enable customization and scale to an individual rider�s liking via the AXS App Overload Clutch - In the event of an impact, the motor gearbox disengages, giving the derailleur freedom to move thus resisting damage Tested to IP69K water and dust proofing standard for creek crossings, mud splatterings and the resulting post-ride pressure washings Features a carbon cage and titanium hardware **BATTERY NOT INCLUDED - BATTERY PART #530147 - SOLD SEPARATELY XX1 AXS 12sp 50 Long BlackUPC/EAN/GTIN: 710845824036