When your oximeter watch is turned on, are you seeing one of the screens below?
The oximeter screen is a touch screen and will switch to one of these screens if prompted.
If you are seeing the Step Count or Time/Date screen, touch the screen and scroll from left to right on the screen until you get back to the main readings screen.
If you are seeing the Bluetooth Icon/ Battery screen, touch the screen and scroll from the bottom to the top and it will get back to the main readings screen.