Train even better with heart rate monitoring when you pair the HRM-Swimª monitor with a compatible Garmin watch1. The durable, nonslip strap keeps the heart rate monitor in place, even during wall push-offs. Sleek design causes minimal drag and stores heart rate data as you swim. Out of water during rests, real-time heart rate, interval summaries and other stored heart rate data are transmitted to the watch. HRM-Swim stores up to 20 hours of heart rate data, and itÕs designed for all swim environments, including freshwater, saltwater and pools.