The X0 Eagle AXS Transmission Spindle Power Meter offers riders accurate, live power data housed in our most advanced aluminum crankset. The power meter technology is integrated into what we call "DUB-PWR" – a unique design that elegantly houses Quarq's reliable and accurate power measurement within the DUB crank spindle itself. It measures power on the left side to calculate total watts, is subtle, lightweight, compatible with any chainring, and boasts unrivaled battery life. It is also compatible with the Flight Attendant system, connecting all AXS components. No compromises, no hassle with data delivery for robustness. This applies only to the left crank arm and has a length of 170mm. Innovative design, power meter hidden in the crank arm Long battery life +/- 400 hours Waterproof IPX7 (up to 1 meter or 30 min) Quarq trusted and reliable technology Flight Attendant compatible