1. 1. After entering the main page from the "Samsung Health" APP installed on the mobile phone, you need to open the restrictions of the mobile phone to find the measurement options, find the "blood oxygen saturation" function, click "Measure", put your finger on the heart rate sensor on the back of the mobile phone, and keep still without any big movements. The sensor will emit red light.
2. Secondly, pay attention to the fact that the finger should be placed directly above the sensor to accurately measure the value, and the screen of the mobile phone shows that it is being measured.
3. Finally, keep quiet. There is a continuous waveform chart below, which will show the progress of measurement, from 20% to 100%.