Features:

This fingertip pulse oximeter is designed to measure Oxygen Saturation and Heart Rate through the finger, here is the feature list.

Oxygen saturation (SPO2) measurement

Pulse rate (PR) measurement

Power supply 2 x AAA alkaline battery, with battery level indicator

TFT display (0.96 inch)

Auto shut down to save power (turn OFF LCD display after you take out your finger 10 seconds later, and will shut down device after 1 minute later)

Accurate PR and SPO2 data reading (refer to below)

Battery life (more than 4000 cycles)