Integrated with SPO2 probe and processing display module. Small in volume?light in weight and convenient in carrying. Operation of the product is simple ,low power consumption. SPO2 , PR and Ridisplay,. Pulse rate value display, bar graph display. Low-voltage indication: low-voltage indicator appears before working abnormally which is due to low-voltage. Automatically power off function: when the device is under the state of measuring interface . it will automatically power off within 5 seconds if the finger falls out of probe.