Omron Healthcare's continuous Strapless Heart Rate Monitor (HR-500U) enables exercise enthusiasts to be confident in accurate, continuous heart rate monitoring without an annoying chest strap. The monitor measures heart rate via an optical sensor on the wrist and an accelerometer to determine pace, distance and calories burned. As blood flow changes from beat to beat, the optical sensor measures the blood's movement in and out of the capillaries and record the heart rate on a continuous basis. A colored LCD light helps determine which heart rate zone the wearer is in and alerts if the zone is too high or too low. Readings from the last workout are accessible on the monitor and 10 hours of data stored within the unit can be transferred to www.omronfitness.com.
