1. Pulse oximeter, fingertip, Little Doctor MD300 C23 is designed for continuous non-invasive measurement of arterial hemoglobin oxygen saturation (saturation) and pulse rate. 2. The device takes a measurement on the finger of the hand. At the bottom of the device, two LEDs are built in, which alternately emit light in the red and infrared regions of the spectrum. In the upper part there is a sensor with a photosensitive element that registers the radiation that has passed through the finger. By analyzing the absorption of radiation with red and infrared wavelengths, the saturation value is calculated. The value of the pulse rate is obtained by analyzing the pulse wave characterizing the heart rate over time. 3. The results of the analysis are displayed on the display of the oximeter in the form of saturation level and pulse rate values. Large bright numbers on the display are clearly visible in any light; the brightness of the glow is adjustable. Information can be displayed in 6 preset modes. The device is equipped with sound indication. 4. Features: Simple measurement of human hemoglobin oxygen saturation and heart rate Application without age limit 6 Display display modes Low power consumption Sound indication Light weight and compact dimensions Warranty 1 year