The Bowflex Strapless Fitwatch F10 Heart Rate Monitor Watch measures heart rate instantly without a chest belt featuring the new chest belt app – compatible with most ECG chest belts. Using a heart rate monitor is the easiest way to ensure you’re reaching your optimal heart rate during workouts or to track stress levels during the day. It also enables you to keep training at the right level of intensity, giving you immediate feedback on how hard you are working out. Choose between continuous heart rate using a chest strap or measure heart rate through patented quick touch technology! Burn fat, lose weight efficiently, improve health and fitness!