The Approach® S62 device has a wrist-based heart rate monitor and is also compatible with chest heart rate monitors (sold separately). You can view heart rate data on the heart rate widget. If both wrist-based heart rate and chest heart rate data are available when you start an activity, your device uses the chest heart rate data. Your watch has a heart rate menu, enabling you to view wrist-based heart rate data. Displays your current VO2 max., which is an indication of athletic performance and should increase as your level of fitness improves ( Getting Your VO2 Max. Estimate). Broadcasts your current heart rate to a compatible device ( Broadcasting Heart Rate Data to jldBf.