The Innovo Premium iP900BP Fingertip Pulse Oximeter shows your measured SpO2 and pulse rate on a high-quality OLED screen. It comes with two critically acclaimed features, the Plethysmograph Waveform and Perfusion Index (PI), that will help determine the reliability of your readings. If the value is less than 0.2%, this means that your hands are either too cold or improperly positioned in the oximeter. Choose the layout that you can read conveniently or switch pulse oximeter always stays in one position. Simply press and hold the power button to rotate the screen.