The HRM-Pro Plus premium chest strap lets you share accurate heart rate data with compatible Garmin devices, apps, and equipment. It transmits heart rate and heart rate variability data, while also offering running dynamics to improve your form when paired with a Garmin smartwatch. With easy, tool-free battery changes and up to one year of battery life, this monitor also tracks steps, calories burned, intensity minutes, and more, even when you're not wearing your watch. Plus, connect it to your Garmin smartwatch for detailed pace and distance data during indoor runs. Features dual transmission, real-time heart rate accuracy, improved connectivity via ANT+® and BLUETOOTH® low energy, and race dynamics and data storage functions. Up to 1 year of battery life.