Vakoss Pulse Oximeter XY21G

One-button operation: Blood Oxygen saturation (SpO2)/Pulse Rate (PR)/Perfusion Index (PI)Flexible finger clipAutomatic shutdownPulse volume waveFast measurement (7 seconds)There are four directions of display for selection.Quick and Precise ReadingOxygen saturation display range (%SpO2): 0%~100%The normal value of blood oxygen saturation in healthy people is 93-99%. (for reference only)"«Pulse rate display range (PR): 25BPM~250BPMThe normal pulse/heart-rate range is 60-90 beats per minute BPM (for reference only).»Perfusion Index (PI) value reflects pulsatile blood flowPower Requirements: AAA x 2 battery (not included)Working current: less than 30mADimensions: 57x32x33mmProduct net weight: 25g