Oxygen Monitor Portable Digital Reading LED Display with 2 Batteries and Lanyard

LPOW Fingertip Pulse Oximeter With Sound Reminder Function This Pulse Oximeter can be used to measure accurately human Blood Oxygen Saturation(SpO2) and Pulse Rate(PR) through finger.And there have Sound reminder function when readings show. Suitable for exercise enthusiasts like mountain climbers,bikers,skiers, aviators, or anyone is interested in measuring their Blood Oxygen Saturation(SpO2) and Pulse Rate(PR).This device is for Sports & Aviation use only. SpO2 Range: 0% - 100% Pulse Rate Range: 30-250 bpm Relative Humidity:15%-93% non-condensing Air Pressure:70Kpa-106Kpa Operating Attitude:0-2000m