Garmin HRM Run
GARMIN® HRM-RUN™ :: Power up your running performance by pairing your compatible Garmin® Forerunner® 620 watch with the HRM-Run™ monitor. You'll track not only your heart rate, but also get real-time feedback about your running form by measuring your cadence, ground contact time, and your degree of bounce. Trust us, this is a workout-booster that no runner should go without!