Features: Fingertip pulse oximeter for simple daily checking, can be used in families, social care institutions, community service center, 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 colorful LED screen showing SpO2 value, pulse rate (PR), etc. Clear display and easy to read. Easy to use, open the probe, then insert one finger into the probe, turn on the oximeter, after about 5 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. Specifications: Screen: LED SpO2: 70%-100% (1% Resolution) PR Measuring Range: 25BPM-250BPM (1BPM Resolution) Battery: 2 * 1.5V AAA Battery (NOT included) Main Material: ABS Testing Results: 5S Shut off Automatically: 8S Item Size: 6 * 3.2 *3.2cm/ 2.4 * 1.3 * 1.3in Packing List: