ACCURATE and RELIABLE: This oximeter can measure and monitor heart rate, SpO2 and pulse intensity with high accuracy. Displays waveform (plethysmograph) and digital readings, as well as pulse bar graphs, to visually indicate any irregularities or abnormalities, such as weak heartbeat._x000D_ EASY TO USE: Insert finger into silicone of the pulse oximeter and press "on". Intelligent tool for exercise recovery, elderly, hikers, climbers (monitor the oxygenation rate of cells, for overall health