Wellue O2Ring S9 Continuous Pulse Oximeter – Sleep Monitor (SpO2 & Heart Rate)

Pre-owned and fully functional. This device has been lightly used and works as intended. There is light cosmetic wear/surface scratching on the screen that may be visible under certain lighting (see photos), but this does not affect performance.

This wearable ring-style pulse oximeter is designed for comfortable overnight use and provides continuous monitoring of blood oxygen levels (SpO2) and heart rate. Ideal for sleep tracking and gaining insight into nighttime breathing patterns.

Key Features:
• Continuous SpO2 (blood oxygen) monitoring
• Continuous heart rate tracking
• Comfortable soft ring design for overnight wear
• Vibration alerts for low oxygen levels
• Bluetooth connectivity with companion app
• Rechargeable battery
• Detailed sleep and oxygen trend reports

Condition:
Lightly used with minor cosmetic wear. Fully tested and working.

Includes:
• Wellue O2Ring S9 device ONLY
• Charging cable NOT included (uses standard Mini-USB cable, widely available)

Additional Notes:
This is a wellness monitoring device and is not intended for medical diagnosis or treatment.

Ships quickly and carefully packaged.