The reasons for inaccurate measurement of blood oxygen include wearing styles, skin color, hair, reduced blood perfusion, low temperature and blood vessel contraction, or dirt and water stains between the watch and wrist. All of these reasons will affect the accuracy of the measurement and even lead to failure.
You can restart the measurement according to the following methods:
1. Wear the watch to the distance of one finger from the wrist;
2. Wear the watch and keep it still during the measurement;
3. You can follow the user manual to operate.
Note:
This product is not a medical device, and the results are for reference only and are not used as a basis for diagnosis and treatment.