The XX SL Eagle AXS Transmission Power Meter Crankset boasts Sram`s new XX SL crank arm with an integrated power meter to record and deliver live, accurate power readings to your head unitNew spider design uses a proprietary chainring mount system which has allowed reduced weight without compromising reliabilityDual sided power measurement system calculates total watts, itÂ’s subtle, lightweight, and boasts unbeatable battery lifeCompatible with the Flight Attendant system, allowing for total connectivity between all AXS enabled componentsCompatible with DUB BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, and BSA MTB68SP bottom bracketsMagicZero - automatically checks and recalibrates your power meter as you rideBluetooth low energy technology and ANT+ wireless data transferUser replaceable CR2032 battery 200-hour battery lifeAxCad -- no cadence magnet required170x34DUBBLKThread Mount1x12UPC/EAN/GTIN: 710845891816