Heart Rate — the Easy, Accurate Way This premium heart rate strap transmits real-time heart rate data over ANT+ connectivity and other technology, giving you more training options. Consistently receive accurate heart rate on your device, in online training apps or even the compatible fitness equipment at the gym. Track Running Dynamics In addition to heart rate, HRM-Pro captures running dynamics that can help you improve your form. That includes metrics such as vertical oscillation, ground contact time, stride length, vertical ratio and more. HRM-Pro Store and Forward Your Data The device stores heart rate data during swimming or other activities while your watch is out of range, then sends that data to your watch once the activity is finished. It will also store steps, calories and intensity minutes, then sync them to your watch as well. Comfort and Convenience HRM-Pro features a small, lightweight heart rate monitoring module that is no wider than the width of the soft, comfortable strap.