The Santamedical SM-210 Finger Pulse Oximeter is a device that displays the pulse rate, oxygen saturation levels, and plethysmograph bar. This finger pulse oximeter consumes very low power and it measures with high accuracy giving the most reliable results. There are a lot of sports enthusiasts, and also the bikers, hikers, skiers, climbers, and many others who are interested in measuring the pulse rates and the oxygen saturation levels. The device works on the batteries that are rechargeable. This oximeter can be stored in the humidity of 10% RH to 95% RH.