Real-time detection of blood oxygen saturation (SpO2) and heartbeat
Finger type (recommended left middle finger, fingernail up)
For normal person, the blood oxygen saturation (SpO2) in the body should be between 97% and 99%
If the blood oxygen saturation (SpO2) is lower than 95%, it is necessary to pay attention to the hypoxia state, especially below 90%, it is recommended to do a more detailed cardiopulmonary function test