The HRM 600 premium heart rate monitor is built for data-driven performance athletes looking for accurate heart rate and HRV data plus running dynamics. This monitor provides accurate heart rate data for all your activities, including running, indoor and outdoor cycling, strength training and more. The HRM 600 heart rate monitor sends accurate real-time heart rate and HRV data to your compatible Garmin smartwatches and Edge® cycling computers, compatible fitness equipment, the Tacx Training™ app and other apps. The small, lightweight heart rate module fits within the width of the soft, comfortable strap. It comes in 2 sizes (XS–S and M–XL), so you can choose the ideal fit for your body.