1,Monitoring pulse, SpO2,PR(Pulse Rate). 2,Displaying volume and column diagram of stroll. 3, ... ×20×8.5cm8Boxes /CTNS : 480×420×200mm Finger Pulse Oximeter Function:1,Monitoring pulse, SpO2,PR(Pulse Rate). 2,Displaying volume and column diagram of ... battery voltage is so low that normal operation of the oximeter might be influenced5,The product will automatically be powered off ...