Polar RS400 Heart Rate Monitor Watch Designed for the active endurance athlete who wants to improve his or her performance by planning, monitoring and analyzing training data, the Polar RS400 wrist heart rate monitor helps you to easily and accurately measure your heart rate to help you get to just the right intensity or your exertion level. The RS400 has one... 

Polar RS400 Heart Rate Monitor Don’t just go out for a run. Analyze it with the Polar RS400 Heart Rate Monitor. This heart rate monitor keeps track of your average, maximum, and target heart rates so you know how you’re performing. The Polar OwnCode feature keeps other people’s heart rate monitors from interfering with your RS400. The RS400...