used daily in medical settings, the oximeter turns out to be accurate and reliable and has worked on all fingers encountered. Better than other more expensive devices. Refer to the manual available on the website of Beurer [...]: this oximeter is announced with an accuracy of +/- 2% (for saturation between 70 and 100%) and an accuracy of +/- 2 beats / minute ( to a heart rate between 30 and 250) Device to advise, good quality, good price / quality ratio
