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.