Designed for the competitive cyclist, the Stealth 50 is GPS and ANT enabled, so it works with CatEye or third party ANT compatible power, heart rate, cadence and speed sensors.The Stealth 50 is a simple power meter that is ANT compatible, so it works with CatEye or third party ANT power, heart rate, cadence and speed sensors. Track basic cycling data and combine with power, heart rate and cadence data to target and reach training goals. Upload ride data to web based training sites, such as CatEyeAtlas.com and TrainingPeaks, where you can visualize your activity, analyze performance and share your ride. Other features include a full time backlight, auto stopstart and programmable odometer. The Stealth 50 is waterproof, USB rechargeable and can be used on multiple bikes, so youll always be ready to ride.