Come and see our amazing products. This finger pulse oximeter oxygen saturation monitor shows your measured SpO2 and Pulse Rate on a high quality OLED screen in six multidirectional display choices. The Perfusion Index (PI) will improve the reliability of the readings. If the PI value is less than 0.2%, this means that your hands are too cold or improperly positioned in the pulse oximeter. This pulse oximeter can also correct for small movements. It is good for spot check of blood oxygen saturation level at home. Rush services available. Pls confirm further with us if any query about packing info, inventory status and time schedule.