O2 Score is a measure of oxygen shortage during whole sleep. It combines frequency, duration, and depth of oxygen drops. A higher score means oxygen is richer. If it's yellow or red, please ask your doctor for advice.

Click the question mark in the upper right corner of the APP report page.

DO NOT PAIR in the system settings of your phone. Make sure the Bluetooth is enabled on your phone and device’s battery is not out.

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

If you can’t connect your device after updating iOS, please try the following steps:

-In the system settings, turn off and turn on Bluetooth;

-In the Control Center, tap the Bluetooth icon repeatedly to re-enable Bluetooth.

-Turn on device, run App to connect it.

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

-After the countdown, open App to sync data.

-Or next time after you turn on your device, open App to sync.

If measurement time is less than 2 minute, there will be no data.

The device has built-in storage, it is not necessary to open App.You can open app to change some settings of device.

The device can store last 4 sessions, up to 10 hours for each.

The ring is elastic, inside circumference range is about 2.0~3.2 inch.

Thumb and index finger are preferred.

General rules:

-Do not use middle finger.

-Avoid loose wearing

Generally speaking, yes. However, frequently movement may make the readings unavailable.Usually, the readings will recover in a few seconds after stop moving.

Wear the device on your finger, it will power on automatically. If can’t power on, charge you device first.

Take the device off your finger, it will power off automatically in a while if not connected to App.

Yes

Yes. When you connect the monitor to your phone, you can turn on/off the vibration, change intensity or threshold.

Connect to your phone, device clock will follow your phone time automatically.

Yes, you can set the screen mode in App. Battery will runs out a bit faster in the Always On Mode.

Touch the key on the top of device, you can wake up the screen. You can also check time and battery with the touch key.

Please be assured that all Wellue products provide medically accurately measurement.

Different manufacturers utilize algorithms with different average SpO2 times, which is a significant element when calculating the reading. The shorter the collecting duration, the more sensitive the result, the fast the response. Oxygen monitor with too long assessment time is not the best choice for oxygen saturation detection, especially during sleep. Our intelligent averaging algorithm collects data quickly and identifies the precise SpO2 value.

Therefore, it is not rigorous to compare oxygen monitors that utilize different averaging algorithms. The comparing result will be much more accurate if obtained by an arterial blood gas.

Yes.