When you need accurate heart rate and heart rate variability (HRV) data, the HRM 200 heart rate monitor is there to capture it all.Sends real-time heart rate and HRV data to compatible devices and appsUp to 1 year of battery lifeComfortable and available in 2 sizes for an ideal fitDurable with a 3 ATM water rating and a machine washable strap for easy cleaning Garmin HRM-200 Heart Rate Monitor Heart Rate Straps and Accessories UPC: 753759349547