HRM-Pro Plus transmits real-time heart rate data to compatible devices, equipment and apps. Get a tool-free battery door and up to 1 year of battery life. No, it’s not just a heart rate monitor. Running dynamics also help you improve your form (requires compatible Garmin smartwatch). Connect to your compatible Garmin smartwatch, and get pace and distance data for your indoor runs. Not wearing your watch? HRM-Pro Plus captures steps, calories burned, intensity minutes and more.