Garmin HRM Pro Plus

Premium heart rate strap transmits accurate real-time heart rate and heart rate variability data via ANT+ technology and BLUETOOTH Low Energy technology to Garmin devices, compatible fitness equipment, the Tacx Training app and other apps
Captures running dynamics, such as vertical oscillation, ground contact time, stride length, vertical ratio and more to help improve your form and enable running power on your compatible Garmin watch
Computes pace and distance for treadmill or indoor track workouts