This pulse oximeter is a CE marked medical device. It monitors the amount of oxygen carried in the body. It is a non invasive tool that measures your pulse rate and your oxygen levels, reading data through your fingertip screening.
You can easily use it at home: place your finger inside the opening of the device and press the power button. Once the oximeter finishes its assessment, its screen will display the percentage of oxygen in your blood— as well as your current pulse rate.