Wellue Checkme O2 Max Pulse Oximeter O2 Sensor Ring Tracking SpO2 Heart Rate 72h

CONDITION; open box - see photos

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Wellue O2 Pulse Oximeter with Smart Reminder | Blood Oxygen Saturation Monitor for SpO2 and Heart Rate Tracking Continuously, Bluetooth Finger Ring

【Free APP&Software for Android, iOS&PC】The "Vihealth" App and "O2 Insight Pro" Software allow you to share all-day data and trend easily, or watch your real-time O2 level and heart rate on your phone, tablet or computer. Please download "Vihealth" from Apple Store or Google Play.
【Smart Vibration & Audio Reminder】The oximeter vibrates and keeps making a "drip" sound if blood O2 saturation falls below your defined level. Vibration and sound intensity can be adjusted.
【All-day Monitoring】Checkme O2 Max records your O2 level (blood O2 saturation level), pulse rate, and motion with extremely accuracy.
【Comfort Patented Ring Sensor】Soft silicone ring sensor won't make your finger numb and never slips from your finger, which completely frees your finger.
【Up To 72Hrs Long-lasting Use】No AAA batterie

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