1.Multi-function: Digital pulse oximeter can be used to measure pulse rate, blood oxygen saturation levels, and perfusion index accurately. 2.Easy to Read: Support beep sound, SPO2, pulse, and bar chart, you can view your result very clear with LED display. 3.Easy to Use: Accurate and reliable, one-button operation, just clip it on to your finger and turn it on at the press of a button. 4.Suitable for everyday use. Widely used in a family, oxygen bar, social organizations, physical care in sports, etc.