Sram: The XX SL Eagle AXS Transmission Power Meter records and delivers live, accurate power readings to your head unit. Utilizing an all-new spider-based design, this is our most accurate, high performing power meter. The spider design uses a proprietary thread-on chainring mount system which has allowed us to reduce weight without compromising reliability. A dual sided power measurement system calculates total watts, it’s subtle, lightweight, and boasts unbeatable battery life. It is also compatible with the Flight Attendant system, allowing for total connectivity between all AXS enabled components. No-compromise, high-performance data delivery giving you an edge over the competition. FEATURESAll new design with proprietary thread-on T-Type chainrings, available in 32-38t.Compatible with all Eagle Transmission 8-Bolt cranks.Compatible with Flight Attendant.+/- 1.5% accuracy.User replaceable CR2032 battery 200-hour battery life.Bluetooth low energy technology and ANT+ wireless data transfer.MagicZero - automatically checks and recalibrates your power meter as you ride.AxCad -- no cadence magnet required.10K Temperature Compensation.Waterproof (IPX7 waterproof to 1 meter for 30 minutes).AXS™ enabled for easy monitoring and firmware upgrades SPECIFICATIONSBolt Circle Diameter (BCD): Thread MountBB Spindle Interface: DUBPower Meter Type: Spider