Nike Timing Triax C5 Heart Rate Monitor Watch

The Nike Triax C5 Watch is a simple but effective heart rate monitor ideal for the casual exerciser who wants to take advantage of modern technology without spending hours reading a manual. The C5 has a single heart rate zone, which gives you a warning beep if you go outside a range you set. The C5 is water resistant in case of triathlon, and both the watch and chest strap have easy to change battery compartments.