DO NOT PAIR in the settings of smartphone. Make sure the Bluetooth is enabled both on your phone and monitor.

Just launch App, select the device ID to enter App for the initial use. 

With android phone, you need to allow Location access to make Bluetooth work. We DO NOT collect your location data.

If you had refused the permission, you can try following steps to allow the access:

- Reboot your phone;

- Turn on “location”on your phone;

- System settings -> Apps-> ViHealth, allow location access.

When the screen of the monitor lives, the Bluetooth is on. When the screen is black, press the button to light the screen to enable Bluetooth.

Take off the sensor. After the countdown, the data will be ready for sync.

- After the countdown, launch App to sync.

- Or next time after you turn on your monitor, launch App to sync.

Usually no need. If you don’t use it, it will power off automatically in a while.

Yes

Yes. When the monitor connects to your phone, you can turn on/off the vibration, adjust intensity or threshold on App.

Note: The vibration function is not supported on Checkme O2 Lite.

Yes, when you take the sensor off, the countdown will begin. During the countdown, wear the sensor again, the record will be resumed.

- Turn on your monitor.

- Launch App on your phone.

- The date and time on your monitor will automatically sync as your phone settings when it connects to App successfully. 

You cannot delete the stored data manually. The stored data will be overwritten by the latest measuring data.

Yes, ambient light containing the red spectrum may interfere with accurate readings from the oxygen saturation monitor.