✅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. FDA 510(K) Cleared. ✅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). Essential to take reading without moving the body or hand to obtain accurate result. ✅ LIGHT AND PORTABLE: Monitor is very light, small in size, low in power consumption and easy to carry with detachable lanyard; so, you can measure oxygen saturation anywhere. Auto power off s seconds after removing finger saves battery life. Requires two AAA batteries (included).