medical device pulse diagnosis Working principles Based on photoelectric oxyhemoglobin inspection technology together with capacity pulse scanning and recording technology, our hot sale finger pulse oximeter is applied to measure human's SpO2 and heart rate. An overview of hot sale finger pulse oximeter The strengths of hot sale pulse oximeter Light, small, portable but also fit your demands Easy to operate, quick to get output Low comsumption and long working time Particularly suitable to use in public, household and personal medical measurements