Features include an easy to read bright digital LED display, 30+ hours of continuous monitoring on one set of batteries. Integrated SpO2 probe and processing display module plus SpO2 and Pulse Rate and bar. Low battery level indicator. Auto power off. Low power consumption on 2 AAA batteries.
Fingertip Pulse Oximeter, Blood Oxygen Saturation Monitor (SpO2) with Pulse Rate
Features include an easy to read bright digital LED display, 30+ hours of continuous monitoring on one set of batteries. Integrated SpO2 probe and processing display module plus SpO2 and Pulse Rate and bar. Low battery level indicator. Auto power off. Low power consumption on 2 AAA batteries.
https://www.amazon.com/Fingertip-Oximeter-Saturation-Measurements-Batteries/dp/B086KZ8JVH