The pulse oximeter PO40 from Beurer is intended for non-invasive measurement of arterial oxygen saturation (SpO2) and heart rate (pulse rate). The oxygen saturation indicates the percentage of the hemoglobin in the arterial blood that is saturated with oxygen. Therefore, it is an important parameter for assessing respiratory function. When measuring, the pulse oximeter uses two light beams of different wavelengths, which come down on the inside of the housing on the finger placed in the device.   A low oxygen saturation value is in most cases caused by conditions (asthma, heart failure, respiratory diseases, etc.). People with a low oxygen saturation value often suffer from the following symptoms: respiratory distress, increased heart rate, reduced performance, nervousness and sweat outbreaks. In case of chronic and known reduced oxygen saturation, regular check-ups under medical supervision should be performed. The pulse oximeter is used for this.   In case of acutely reduced oxygen saturation, with or without the associated symptoms, a doctor should be consulted immediately. This can be a life-threatening situation. The pulse oximeter is therefore particularly suitable for high-risk patients (such as asthmatics and people with heart diseases), but also for athletes and healthy people who often find themselves at high altitudes (such as mountaineers, skiers or hobby pilots).   Features of the Beurer PO40: * Measurement of arterial oxygen saturation (SpO2) and heart rate (pulse rate) and pulse modulation index (PMI) * Measurement of SpO2 as a potential vital sign in acute illnesses * Extremely simple and completely painless measurement * Small and light; for home and on the go * Particularly suitable for people with: * Heart failure * Asthma * Chronic obstructive pulmonary diseases * Useful for sports at high altitudes (such as mountain climbing, skiing and sport flying) * Symbol on display for incorrect measurement * Easy to read color display * Display with 7 display formats * Adjustable display brightness * Graphic display of heart rate * Battery indicator * Automatic shutdown * Includes wrist strap and belt bag * Medical product * Includes 2x AAA batteries * Product size 5.8x3.4x3.7 cm * Product weight (including batteries): 57 grams *.