Polar RS200 Running Computer Monitor Wrist-style heart rate monitor and stopwatch in black geared for runners With optional S1 footpad, take advantage of the RS200's Speed and Distance functions Polar's OwnZone helps determine an individual exercise zone; calorie counter and goal management OwnCal feature shows your energy expenditure during one exercise session and accumulated expenditure Dual time zone, alarm with snooze, and water resistance to 50 meters