The Cardiosport 2001 Heart Rate Monitor provides essential information that you need in order to monitor and improve your physical conditioning. Competitive athletes and fitness-conscious individuals use the Cardiosport 2001 for: Increasing performance, faster heart rate recovery, increased aerobic capacity, controlled long-term training, weight control. The easy-to-read display is fully descriptive and operates using four buttons to cycle through the functions. Press the buttons two ways: press, hold, and then release; or press and release immediately.