Track your health with the Fingertip Oxygen and Pulse Rate Monitor Oximeter Choose from green, grey, blue or purple  Measure your blood oxygen levels and pulse rate at the touch of a button Date will be displayed on the LED screen within seconds Designed with a self-adjusting spring which can fit any size finger without tension Clip is also cushioned with rubber padding for extra comfort Measurement range: 70-99%  Pulse repetition rate: 30bpm-250bpm; measurement range: 30-240bpm Accuracy: ±2 bpm or ±2% Powered by 2 x AAA batteries  Auto power-off after 10 seconds means that the oximeter retains its charge longer Voltage: 2.6-3.6V, energy consumption: