garmin hrm 600 heart rate monitor xs s black yellow running dynamics fitness tracker 2 month battery bluetooth antHrm 600, the premium heart rate monitor, is built for data driven performance athletes. It provides highly accurate heart rate and hrv data to compatible garmin smartwatches and cycling computers, equipment, and apps. Dial in your running with running dynamics, including step speed loss to understand how much you slow down when your foot hits the ground (with a compatible smartwatch). Hrm 600 is easily adjustable and available in two sizes so its