Product Overview
The CNBRO Smart Ring is a versatile health and fitness tracker designed to monitor various physiological metrics discreetly. It tracks heart rate, blood pressure, sleep patterns, steps, calories, and distance. The ring is waterproof and comes with a portable charging case for convenience.

Image: The CNBRO Smart Ring, highlighting its ability to monitor heart rate, blood oxygen, and blood pressure.
Setup Guide
1. Unboxing and Components
Your CNBRO Smart Ring package includes the following items:
- 1x Smart Ring
- 1x User Manual
- 1x Charging Cable for Ring
- 1x Charging Case (without cable)
2. Charging the Smart Ring
Before initial use, fully charge your Smart Ring. The ring comes with a portable charging case. Connect the charging cable to the case and place the ring inside. A full charge typically provides 5-7 days of continuous use.

Image: The Smart Ring being charged within its compact charging case, emphasizing its extended battery life.
3. App Installation and Pairing
Download the 'ECTRI' application from your smartphone's app store. The app is compatible with iOS 6.0 or above and Android 11.0 or above, requiring Bluetooth 5.1. Follow the in-app instructions to pair your Smart Ring with your device. This connection enables data synchronization and access to all monitoring features.

Image: A mobile phone screen showing the ECTRI application, displaying real-time health monitoring data such as sleep analysis, heart rate, and blood oxygen levels.
4. Sizing and Wearing
Ensure the ring fits snugly but comfortably on your finger for accurate readings. Refer to the sizing chart below to determine the correct size.

Image: A detailed sizing chart for the Smart Ring, including inner diameter and perimeter measurements, along with a two-step guide for accurate finger measurement.
Operating Instructions
1. Health Monitoring
The Smart Ring continuously monitors your health data. Access the ECTRI app to view real-time and historical data for:
- Heart Rate: Monitor your heart rate at any time with a single click in the app.
- Blood Pressure: Track your blood pressure readings. Note: This device is not a professional medical instrument; readings are for reference only.
- Sleep Tracking: The automatic sleep tracker analyzes your sleep status, providing insights into deep sleep, light sleep, and wake-up times.

Image: A woman sleeping while wearing the Smart Ring, with an overlay showing detailed sleep analysis data on a smartphone screen, including deep sleep, light sleep, and awake times.
2. Activity and Fitness Tracking
The ring automatically collects daily activity data:
- Pedometer: Counts your steps throughout the day.
- Calorie Consumption: Estimates calories burned based on your activity.
- Distance: Tracks the distance walked or run.
Activate specific sport modes within the ECTRI app to track your sport route, activity time, and heart rate during exercise for detailed performance analysis.

Image: A hand wearing the Smart Ring, with an overlay showing real-time motion monitoring data including sport record duration, mileage, calories burned, and heart rate.
Maintenance
1. Waterproofing Guidelines
The Smart Ring is IP68 waterproof, allowing it to withstand swimming, hand washing, cold showers, and rain. This ensures continuous tracking of your data in water-related situations.
- Important: Do not expose the ring to hot water or steam.
- After swimming, shake off excess water and wipe the ring dry.

Image: A hand wearing the Smart Ring submerged in water, illustrating its IP68 waterproof capability for activities like swimming and washing hands.
2. Cleaning
To clean your Smart Ring, gently wipe it with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials that could damage the finish or sensors.
3. Battery Care
To prolong battery life, avoid fully discharging the ring frequently. Charge it regularly using the provided charging case and cable.
Troubleshooting
If you encounter issues with your Smart Ring, refer to the following common solutions:
- Connectivity Issues: If the ring loses Bluetooth connection, try re-pairing it with the ECTRI app. Ensure your phone's Bluetooth is active and the ring is within range.
- Inaccurate Readings: Ensure the ring is worn snugly on your finger. Readings can be affected by loose fit, excessive movement, or environmental factors. Remember that blood pressure readings are for reference only and not for medical diagnosis.
- Ring Not Responding: If the ring stops working randomly, place it in the charging case to check if it needs a charge. If the issue persists, try restarting the ECTRI app or your smartphone.
- Reduced Battery Life: Battery performance can degrade over time. Ensure you are using the original charging cable and case. Avoid extreme temperatures, which can affect battery health.
Specifications
| Feature | Detail |
|---|---|
| APP Name | ECTRI |
| Charging Type | Magnetic Charging |
| Battery Capacity | 18mAh Lithium Polymer |
| Work Time | Up to 6 days on a full charge |
| Compatibility | iOS 6.0+ / Android 11.0+ |
| Bluetooth Version | 5.1 |
| Waterproof Rating | IP68 |
| Item Weight | 4.5 ounces |
| Operating System | Proprietary OS |
| Manufacturer | Shenzhen Zhongxin Chuangzhan Technology Co.,Ltd. |
Support
For any questions or further assistance regarding your CNBRO Smart Ring, please contact our customer support. We are committed to providing the best possible solution.





