Train smarter, beat faster. Strap on the Garmin HRM 600 and unlock pro-grade heart-rate accuracy, HRV insights, and full running-dynamics streamed in real time to any compatible watch or app. A rechargeable battery lasts up to two months per charge, the machine-washable strap comes in two sizes, and the 5 ATM rating means sweat, rain, or swim workouts are always on the menu-no excuses.