Finger is an economical and accurate method to detect pulse rate and blood oxygen saturation by finger. Small size, easy to carry. Suitable for daily use, measuring at any time.Resources: Multi-function: Digital can be used to accurately measure pulse rate and blood oxygen saturation levels.Easy to Read: Supports SPO2, pulse and bar graph, you can see the result very clearly with the LED screen.Easy to Use: Precise and reliable one-button operation, just clip it to your finger and turn it on at the of a button. Auto power off after 5s when not in use.Widely Applicable: Suitable for daily use. Widely used in family, oxygen bar, sports physical care, etc. Compact Size: The oximeter is and portable.Blood oxygen measurement accuracy: 70 ~ 100%, +/- 2%, less than 70% undefinedBlood oxygen measurement range: 0 ~ 100% (resolution is 1%)Pulse measurement range: 30~250BPM (resolution is 1BPM)Auto power off: when no finger is inserted, it automatically power off in 5 secondsBattery: 2 AAA batteries (without battery)Colour: blue whiteMaterial: plasticSize: 85mmx65mmx40mmPackage Contents:4 * Oximeter4 * Lanyard4 * Chinese and English manualsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.