One of the main symptoms of respiratory disease is a reduction in lung function, which can lead to lower blood oxygen levels. If you want to track your blood oxygen levels, the Pulse Oximeter 1 Braun allows you to do it in a clear, convenient and comfortable way. Take measurements effortlessly and accurately with these easy-to-use digital tweezers. View the results on the backlit rotating OLED display. And keep the device close at hand with the handy wrist strap. Instructions for use: Pulse oximeter Braun (YK-81C) is a non-sterile, reusable device intended for spot checks or intermittently determining functional oxygen saturation in blood pressure, as well as the associated heart rate, using the fingertip as a reading point. This device is intended exclusively for adults, for domestic use (at home or in business).