1. Introduction
The Wellue O2Ring is a wearable pulse oximeter designed for continuous monitoring of blood oxygen saturation (SpO2) and pulse rate. It features a comfortable ring sensor, vibration reminders for unusual data, and comprehensive data reporting via a free mobile application and PC software.
Important Note: This device is intended for sports and aviation use only and is not a medical device. It is not intended for medical diagnosis or treatment of any medical condition.
2. Product Overview
The O2Ring is a compact and lightweight device that fits comfortably on your finger. It provides real-time readings and stores data for later analysis.

Figure 2.1: Wellue O2Ring device shown alongside its companion smartphone application displaying oxygen level, pulse rate, and motion data.
Key Features:
- Comfortable Soft Ring Sensor: Designed for continuous tracking, adapting to most finger sizes (perimeter 2-3.2 inches).
- Continuous Tracking: Monitors oxygen level and pulse rate continuously.
- Vibration Reminder: Alerts the user with vibration if SpO2 levels fall below or heart rate exceeds preset thresholds.
- Detailed App & PC Report: Provides graphic reports and data trends via a free mobile app (ViHealth) and PC software.
- Unlimited Storage in App: Automatically uploads data to the app via Bluetooth. The device's built-in memory stores up to 4 groups of 10 hours of data.
- Rechargeable: Up to 16 hours of operation on a full charge.

Figure 2.2: Exploded view diagram highlighting the internal components and external features of the O2Ring, including sensors, screen, and charging port.
3. Setup
3.1. Charging the Device
Before first use, fully charge your O2Ring. The device is rechargeable and typically provides up to 16 hours of use on a full charge. Charging time is approximately 2-3 hours.

Figure 3.1: The O2Ring connected to its USB charging cable, indicating the device is being charged.
3.2. Downloading the ViHealth App
To access detailed reports and real-time data, download the free ViHealth app. The app is available on both the App Store (for iOS devices) and Google Play (for Android devices).

Figure 3.2: The ViHealth app interface on a smartphone, showing real-time data from the O2Ring.
3.3. Wearing the O2Ring
The O2Ring is designed to be worn on any finger, with a comfortable soft silicone sensor. It is suitable for finger perimeters of 2-3.2 inches. Ensure the sensor is snug but not too tight for accurate readings.

Figure 3.3: Proper placement of the O2Ring on a finger for optimal monitoring.
4. Operating the O2Ring
4.1. Automatic Operation
The O2Ring automatically powers on and begins recording data once worn. It will continuously track your blood oxygen level and pulse rate.
4.2. Viewing Real-Time Data on the Device
The device features a backlit screen that displays real-time SpO2 and pulse rate readings. A single touch on the device's touch switch will cycle through the display of current time, battery level, SpO2, and pulse rate.
4.3. Syncing Data to the App
Connect the O2Ring to the ViHealth app via Bluetooth. Data will automatically upload to the app, providing a comprehensive history and trends. The app allows for unlimited data storage.

Figure 4.1: Various views of the ViHealth app, demonstrating its detailed reporting capabilities.
4.4. Understanding App Reports
The ViHealth app provides detailed analysis of your data, including:
- Oxygen Level: Graphs showing SpO2 trends over time.
- Pulse Rate: Graphs showing heart rate trends.
- Motion: Indicates periods of activity during monitoring.
- O2 Score: A calculated score based on oxygen levels.
- Drops: Records instances where SpO2 falls below a certain threshold.
You can zoom in/out on charts to view data at 4-second intervals and share PDF/CSV reports with others.

Figure 4.2: Detailed report view within the ViHealth app.
4.5. PC Software for Detailed Reports
For more in-depth analysis, the O2Ring data can be downloaded to a PC using dedicated software. This allows for viewing and exporting reports in PDF and CSV formats.

Figure 4.3: Example of a detailed report generated by the PC software.
4.6. Vibration Reminder
The O2Ring features a vibration reminder that activates if your SpO2 level drops below a preset threshold or your heart rate goes above/below a preset threshold. This feature is designed to alert you without disturbing your sleep.
Video 4.1: This video demonstrates the key features of the Wellue O2Ring, including its continuous monitoring capabilities, real-time display, app integration, and the vibration alert system for abnormal readings.
5. Maintenance
5.1. Charging
Charge the device using the provided USB charging cable. Ensure the charging port is clean and dry before connecting the cable. A full charge typically takes 2-3 hours.
5.2. Cleaning
Clean the O2Ring regularly with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water. Ensure the sensor area is free from dirt or debris for accurate readings.
6. Troubleshooting
- Inaccurate Readings: Ensure the device is worn snugly on the finger and the finger remains still during measurement. Movement can affect accuracy.
- Device Not Powering On: Check battery level and charge the device if necessary.
- App Connectivity Issues: Ensure Bluetooth is enabled on your smartphone and the device is within range. Restart both the device and the app if connection fails.
- Data Transfer to PC: Ensure Bluetooth is turned off on your phone before connecting the device to your PC via cable to avoid conflicts.
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | O2Ring |
| Measuring Range (SpO2) | 70% - 99% |
| Battery Type | 1 Lithium Polymer (included) |
| Battery Life | Up to 16 hours |
| Charging Time | 2-3 hours |
| Connectivity | Bluetooth |
| Internal Memory | 4 groups of 10 hours of data |
| Finger Perimeter Suitability | 2-3.2 inches |
| Color | Black |
| Manufacturer | Viatomtech |
8. Warranty and Support
For warranty information and technical support, please refer to the documentation included with your product or visit the official Wellue website. Contact information for support is typically provided in the user manual or on the manufacturer's website.







