The CMS50L Pulse Oximeter is an innovative device used for measuring pulse oxygen saturation and pulse rate through finger. The device is based on Photoelectric Oxyhemoglobin Inspection Technology for Capacity Pulse Scanning & Recording Technology and finds application in family, hospital, oxygen bar, community healthcare, physical care in sports. (The device can be used prior and post to sport and recommended not to be used during sports activity.) The compact light weight device features SpO2 probe and processing display module. The user friendly oximeter operates on low power and can be easily operated for displaying SpO2 value, pulse rate, bar graph etc. During low voltage the low-voltage indicator appears prior to abnormal working conditions. CMS50L Pulse Oximeter offers a user friendly compact solution solution for measuring of pulse oxygen saturation and pulse rate through finger.