finger pulse oximeter measures blood oxygen saturation (spo2) from the finger. it is compact and light weighted with a coloured led display, that shows spo2 and pr. 4 different display modes. the display shows battery status.  features : automatic shut down, when the pulse oximeter is not used ce approved medical device. risk class (93/42/cee) containment level: ii (iec69601-1) 2 aaa batteries included in package, average of 600 uses in 25° c temperatureÂ