The Race Trainer Pro digital heart rate monitor includes 5 linked interval timers with heart rate zones that acts like a personal coach. This 10-workout memory HRM includes 50-Lap Recall per workout. Download capable with Optional Data Xchanger USB Device. Wear your heart rate monitor to . . . Track your activity level...Maintain a healthy lifestyle...Intensify your workouts. The lightweight Digital Heart Rate Sensor features an adjustable fabric strap and a replaceable battery.