We are offering fingertip pulse oximeterportable fingertip pulse oximeter with wave and beep, integrated with spo2 probe and processing display module, small in size light in weight and convenient in carrying, operation of the product is simple, low power consumption, spo2 value, 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.Power : 2 x aaa batteries.