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Wellue O2Ring Oxygen Monitor with Vibration Reminder

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 All-day Monitoring: It can be used continuously tracking of blood oxygen level, pulse rate and body motion for the whole day. (Up to 16 hours).
 Smart Readings Reminder: If the O2 level is lower than the preset threshold and heart rate is lower or higher than the preset threshold, the device and the APP will vibrate and mark it in the report.

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