ALPHA is the world's first strapless, continuous heart rate monitor you can wear on your wrist. It has been tested EKG-accurate even while you are running at performance speeds of up to 20km/h (12mph)! Before ALPHA, the most common way to get an accurate heart rate continuously while exercising was to wear a strap around your chest.
Heart rate monitoring is useful and beneficial to athletes, helping them optimize their training, control their intensity level, and preventing over- and under-training. But it is not only useful to athletes, it should play a significant role in your everyday life as well.