If you run, you"ll love this Polar  RS100 heart rate monitor 

 Descriptions:

• Track your average heart rate and time of each lap so you can integrate heart rate easily into your fitness running program
• Provides valuable feedback that can help improve your fitness level or lose those last few pounds
• OwnZone® Advanced feature takes the guesswork out of finding your personalized target zone
• OwnCal™ feature counts calories and fat burned based on your own effort level
• OwnCode® is ideal for indoor training, coded transmission prevents cross-talk with other monitors, even in a class environment
• Watch features: time of day with alarm, dual time zone, date and weekday indicator, stopwatch and low-battery indicator
• Wireless chest transmitter is designed for comfort and dependable performance
• Backlight and oversized display make it easy to read even while running
• Wrist unit is water-resistant to 50 meters
• All batteries included
• Color:  Black