The Health Mark Body Tone Heart Rate Monitor which features 20 functions is the ideal training partner for conducting and tracking safe and efficient training sessions. The wide Silk Chest Strap which houses the transmitter provides comfort and freedom from skin irritation, and an excellent contact area for obtaining accurate heart rate readings. Preset functions allow you to establish heart rate parameters which alarm you when your rate climbs too high, as well as when your rate is too low to sustain an efficient workout. The wrist watch style receiver is attractive enough to be worn as an everyday watch.