Polar RS800CX Bike Heart Rate Monitor Watch with CS Speed Sensor W.I.N.D. Sophisticated training watch designed for dedicated, multi-sport endurance athletes Integrated Polar ProTrainer 5 software lets you create custom GPS routes and maps Displays heart rate as percentage of maximum, bpm, and within target zone indicator Includes CS Speed Sensor W.I.N.D. to help optimize daily cycling workouts Built-in altimeter for altitude analysis; 12/24-hour clock; 2-year warranty