DescriptionMeasures the oxygen saturation of a patient’s blood and changes in blood volume.Can be used in hospital, home, community medical treatment, sports healthcare.More InformationCompact design,Light weight for convenient to carry.Working voltage: DC 3VBattery life: about 20 hoursLow voltage indicator.Automatically power off in 8 seconds when there is no signalSPO2:Measurement range: 70~99% Resolution: 1% Accuracy: /- 2% (70%~99%), unspecified (<70% Pulse rate: Measurement range: 30~240bpm Resolution: 1bpm Accuracy: /- 1bpm or /- 1% (which is greater)Package includes: 1 x Finger Blood Oxygen Meter..