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Review Summary
2021-02-10T07:52:58
Battery does not last long enough.
ALGER K.
Wellue O2Ring, Ring Oxygen Monitor,
Sleep with Peace of Mind
Medical-Grade Ring Vibrates Immediately And Silently, When Low Oxygen Levels Or Abnormal Heart Rate Detected
Track Your O2 Every Second
Just wear O2Ring on your finger, it will automatically monitor your overnight blood oxygen saturation, heart rate and body movements continuously.
FDA listed O2Ring uses the same transmissive oximetry technology trusted by hospitals and clinics.