Home/Support/FAQ/

Why are there multiple low blood oxygen levels when the Xiaomi Watch S3 turns on the all-day blood oxygen function and when you wear the watch to sleep, the blood oxygen value appears during sleep/single measurement?

/

Why are there multiple low blood oxygen levels when the Xiaomi Watch S3 turns on the all-day blood oxygen function and when you wear the watch to sleep, the blood oxygen value appears during sleep/single measurement?

1. It is possible for you to have blood oxygen levels lower than 90% when sleeping;
2. Try to ensure it fits your wrist as much as possible when wearing it;
3. The latest firmware version of the watch has optimized the blood oxygen detection function. Please tap [Check for Updates] at the bottom of the [Mi Fitness] App, update the watch to the latest firmware version and try again.