The Wellue O2Ring S is a medical-grade wearable ring oximeter designed for continuous blood oxygen (SpO2), pulse rate (PR), and perfusion index (PI) monitoring — all night long. With a patented ring sensor, soft silicone body, OLED backlit display, and up to 16 hours of battery life, it's the most comfortable and capable overnight oxygen monitor available. Works completely standalone — no smartphone required during use.
SPO2 / PR / PI Detection — 1-Second Interval Recording
The O2Ring continuously tracks three critical vitals at 1-second intervals, providing the most granular data possible for sleep, respiratory, and cardiovascular monitoring.
Blood Oxygen (SpO2): Continuous real-time monitoring throughout the night
Pulse Rate (PR): Accurate heart rate tracking at all times
Perfusion Index (PI): Signal strength quality indicator for reliable readings
1-second recording interval for maximum data resolution
Patented ring sensor technology for precision accuracy
Works Stand-Alone — No Smartphone Needed
Use the O2Ring independently without your phone nearby. The built-in memory stores up to 4 sessions of up to 10 hours each — then sync to the app when ready.
Fully standalone operation — no phone needed during use
Built-in memory stores 4 sessions × up to 10 hours each
Note: The oldest session is overwritten by the 5th. Sync data to your phone regularly.
16-Hour Battery Life
A single charge delivers up to 16 hours of continuous monitoring — more than enough for a full night's sleep plus extra. USB charging port built directly into the device.
Up to 16 hours continuous monitoring per charge
USB charging port
Rechargeable — no disposable batteries
VIHEALTH App — Professional Health Dashboard
Sync your data to the VIHEALTH companion app for rich health insights, trend analysis, and shareable reports.
Real-time Detection: Live SpO2 and pulse rate monitoring via app
Graphic Reports: Visual oxygen level, pulse rate, and body movement charts
History & Trends: Weekly, monthly, and yearly oxygen level history
Multi User Management: Monitor multiple family members from one account
Shareable PDF/CSV: Export and share reports with healthcare providers
Vibration Alerts: Instant vibration when readings drop below your set threshold
Adjustable Threshold: Customize low SpO2 and pulse rate alert levels
Reminder: Built-in notification reminders
Compatible with iOS & Android
Smart Design — Built for All-Night Comfort
Engineered for extended wear with a smooth, ergonomic silicone body that stays comfortable through every sleeping position.
Soft silicone body — gentle on skin for all-night wear
OLED backlit screen — easy to read in the dark
Adjustable screen brightness
Touch switch for easy one-finger operation
Auto on/off for effortless use
Wireless Bluetooth connection to companion app
Patented ring sensor design by Wellue (Original Factory)
