Garmin HRM 600 Premium Heart Rate Monitor, Accurate Heart Rate and HRV Data, Running Dynamics, Stand-Alone Activity Recording, XS-S

Sends accurate real-time heart rate and HRV data to compatible Garmin smartwatches and cycling computers, fitness equipment, and apps Comfortable machine-washable strap is available in two sizes (XS–S and M–XL) for the most ideal fit for your body type Up to 2 months of battery life with a rechargeable battery