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 and PR display, 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.