Color display fingertip pulse oximeter SpO2, and pulse rate,PI(perfusion index) Color display fingertip pulse oximeter USA BrandSpO2, and pulse rate,PI(perfusion index)User-friendly ... /onAudible and visual alarm for SpO2, and pulse rateAutomatic power-off after 6 seconds of idle ... and waveform of SpO2 and pulse, PI (Perfusion Index) and histogram of pulse displayCE certified fingertip pulse oximeter