Used for a month while missing my other HRM. Excellent HRM, will ship with a fresh battery.
Accurate heart rate matters. Optical wrist sensors are notoriously inaccurate for high intensity activities so pairing your watch, bike computer, or phone, is the best way to get HR data. The Garmin HRM Pro also allows you to collect additional run metrics like vertical oscillation, ground contact time, stride length, vertical ratio and more.