How does Wyze Watch check my Blood Oxygen Level?

To check your Blood Oxygen Level: 

1. Make sure the watch fits snugly on your wrist.
2. Swiper right-to-left across the watch screen. 
3. Tap SpO2.
4. Your measurement will be taken after 3 seconds.
   • Hold still, it can take up to 15 total seconds for your results to display.

Note: Unlike your Heart Rate, Blood Oxygen Level can only be measured manually. It cannot be set to measure automatically throughout the day.