Polar RS800CX Heart Rate Monitor Watch 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 Compatible with complete range of W.I.N.D. sensors for tracking speed and distance Built-in altimeter for altitude analysis; 12/24-hour clock; 2-year warranty