Measures Oxygen Saturation and Heart rate (pulse). It is small and light for use at home and on the move. Comes with an easy-to-read display with 4 different views. Benefits persons with heart failure, chronic obstructive pulmonary diseases & bronchial asthma. Provides non-invasive measurement of the arterial oxygen saturation and the heart rate (pulse rate) on the finger. Has on the display an oxygen saturation indicator, heart rhythm indicator (Heartbeats/min), and battery indicator.