Garmin HRM-Run - Heart Rate Monitor - Black/Red DTV7_H7DNN12

Whether youre training for your first 10K or your third marathon of the year, get the most out of your training with Garmins HRM4-Run Heart-Rate Monitor. Pairs with any Forerunner watch to deliver vital training data. Aside from tracking your heart rate, it also monitors your cadence so you know how many steps per minute youre taking. Vertical oscillation measures the amount of vertical bounce in your stride so you can see how smooth youre running. Ground contact time and balance as well as stride length measured in meters provide important information that affects your speed. Vertical ratio is measured as a percentage of your vertical oscillation to stride length, giving you essential training data so you can work on lowering the number by practicing technique and form. Easy-to-adjust strap and lightweight module wont chafe. Water-resistant to 50 meters, but not recommended for swimming.