Specification :

This fingertip pulse oximeter is compact and light in weight, easy to use with only one-key operation. The internal alarm will function while low voltage. Automatically power off after 8 seconds when finger out. The continuous working time can be 39 hours.
LED monitor for extended battery life

SpO2 and pulse monitoring, and histogram of pulse display

Easy to use with one-key operation

Small in size, and easy to carry

Low voltage alarm display

Auto power-off after 8 seconds without signal

Light weight of 50g, batteries included

Runs on standard AAA batteries and continuous working time is 39 hours