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Amazon offers Pulse Oximeter Fingertip Blood Saturation Oxygen Sensor for $ 16.98 with code G4XXVJDA[LIST][*]The pulse oximeter is easy to use and has an efficient one-button operation. Our SPO2 sensor will check and display SpO2, PR and pulse bar graph in real time.[*]Determine your SPO2 and Pulse Rate in 10 seconds or less displayed on its large digital red LED display.[*]SPORT/HEALTH ENTHUSIASTS – For sports enthusiasts like mountain climbers, skiers, bikers or any sports enthusiasts interested in measuring their SPO2 and pulse rate.