1. Introduction
This manual provides instructions for the safe and efficient use of your CNBRO R02 Smart Ring Magnetic Charging Case. Please read this manual thoroughly before using the product.
1.1 Product Overview
The CNBRO R02 is a portable charging case designed to provide convenient power for smart rings equipped with a magnetic charging port. Its compact design allows for easy transport, ensuring your smart ring remains charged on the go.
1.2 Compatibility
This charging case is specifically designed for smart rings that utilize a magnetic charging port. It is not compatible with smart rings that feature wireless charging functionality. Please verify your smart ring's charging method before use.

Figure 1: Compatibility details for the smart ring charging case, highlighting magnetic charging port requirement.
2. What's in the Box
Upon unpacking, please ensure all items listed below are present:
- 1 x CNBRO R02 Smart Ring Magnetic Charging Case
- 1 x USB-C Charging Cable
3. Setup and Initial Charge
3.1 Charging the Case
- Connect the provided USB-C charging cable to the charging port on the CNBRO R02 case.
- Connect the other end of the USB-C cable to a compatible USB power adapter (not included) or a computer's USB port.
- The indicator light on the case will glow red while charging.
- Once fully charged, the indicator light will turn green. A full charge takes approximately 1.5 hours.

Figure 2: Charging the CNBRO R02 case using the USB-C cable.
3.2 Initial Use
For optimal performance, it is recommended to fully charge the CNBRO R02 case before its first use.
4. Operating Instructions
4.1 Charging Your Smart Ring
- Open the lid of the CNBRO R02 charging case.
- Carefully place your smart ring into the designated compartment within the case, ensuring its magnetic charging port aligns with the case's charging contacts.
- Close the lid. The case will automatically begin charging your smart ring.
- The case has a 200mAh battery capacity, capable of charging a smart ring approximately 10 times on a single full charge of the case.

Figure 3: Placing a smart ring into the charging case.
4.2 Battery Indicator Light
- Red light: The charging case is currently charging.
- Green light: The charging case is fully charged.
- Flashing red light: The charging case battery is low and requires recharging.
4.3 Product Video Guide
Video 1: Demonstrating the unboxing and basic operation of the CNBRO R02 Smart Ring Magnetic Charging Case.
5. Specifications

Figure 4: Dimensions of the CNBRO R02 Smart Ring Magnetic Charging Case.
| Brand | CNBRO |
| Model Number | R02 |
| Connectivity Technology | Magnetic Charging |
| Compatible Devices | Smart Ring (with magnetic charging port) |
| Battery Capacity | 200mAh |
| Input Voltage | 5 Volts |
| Output Voltage | 5 Volts DC |
| Output Current | 200 milliamps |
| Charging Port Type | USB Type-C |
| Case Material | Plastic |
| Dimensions (L x W x H) | 43mm x 43mm x 25mm |
| Approx. Case Charging Time | 1.5 hours |
| Approx. Ring Charges per Case Charge | 10 times |
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Charging case not charging. | USB-C cable not properly connected or faulty. Power source issue. | Ensure the USB-C cable is securely connected to both the case and the power adapter. Try a different USB-C cable or power adapter. Verify the power outlet is functional. |
| Smart ring not charging when placed in case. | Ring not properly seated. Case battery is low. Incompatible smart ring. | Ensure the smart ring's magnetic charging port aligns correctly with the case's contacts. Check the case's indicator light; if flashing red, recharge the case. Confirm your smart ring uses magnetic charging and is compatible with this case. |
| Indicator light not working. | Case is fully charged or completely discharged. Internal malfunction. | Connect the case to a power source to see if the red light appears. If no light appears after connecting to power, contact customer support. |
7. Care and Maintenance
- Keep the charging case clean and dry. Avoid exposure to liquids, moisture, or extreme temperatures.
- Use a soft, dry cloth to clean the exterior of the case. Do not use abrasive cleaners or solvents.
- Store the case in a cool, dry place when not in use.
- Avoid dropping or subjecting the case to strong impacts.
8. Warranty and Support
8.1 Warranty Information
This product comes with a standard manufacturer's warranty. Please refer to the packaging or contact your retailer for specific warranty terms and conditions.
8.2 Customer Support
For technical assistance, troubleshooting, or warranty claims, please contact CNBRO customer support through your purchase platform or the official CNBRO website. Please have your model number (R02) and purchase details ready.