Polar F7 Heart Rate Monitor Blue men's heart rate monitor watch with several innovative training features Displays heart rate as percentage of maximum, bpm, and within target zone indicator Audible and visual target zone alarms; 24-hour clock with day/week indicator Polar OwnCal mode tracks energy expenditure for single and accumulated workouts Water-resistant to 50 meters; includes SonicLink and UpLink connections; 2-year warranty