Features: Fingertip pulse oximeter for simple daily checking, can be used in families, social care institutions, community service centers, etc. Intended for measuring blood oxygen saturation and pulse rate of adults or children, and you can use it for measurement before or after sports. Equipped with TFT LCD screen showing SpO2 value, pulse rate (PR), pulse wave, etc, very clear. Easy to use, open the probe, then insert one finger into the probe, turn on the oximeter, after about several seconds, the measurement result can be read directly from the screen. Powered by 2pcs AAA batteries(not included), compact size and lightweight, come with a lanyard, convenient to carry around and use anytime anywhere.