B01708T7NA Garmin Garmin HRM-Run

Style:HRM-RunThe HRM-Run heart rate monitor provides the most advanced running metrics to high-end Garmin Forerunner running watches. The strap is seamlessly comfortable and easily adjustable while the module is small, lightweight and fits entirely within the width strap.
HRM-Run provides 6 different rynning dynamics metrics: cadence, vertical oscillation, ground contact time, ground contact time balance, stride length and vertical ratio
The strap is comfortable and easily adjustable
Real-time data can help athletes take their performance to the next level by showing them where they can improve their running form
Model number: 010-10997-12