1. Introduction
This manual provides essential information for the safe and effective use of your Kircuit USB-C 5V AC/DC Adapter. Please read this manual thoroughly before use and retain it for future reference.
The Kircuit AC adapter is designed to convert AC power from electrical outlets into the DC power required by your compatible device, such as the LIVAROCI U81Q U80Q Blood Pressure Monitor. It serves as a reliable power source for operating your device or charging its battery.

An image showing the Kircuit USB-C 5V AC/DC Adapter, a black wall plug with a USB-A port, alongside a black USB-A to USB-C cable. The adapter has a label indicating 'ACADAPTER INPUT: 100-240VAC 50/60Hz OUTPUT: 5V'.
2. Safety Information
- Use only with compatible devices as specified.
- Do not expose the adapter to liquids, moisture, or extreme temperatures.
- Disconnect the adapter from the power outlet when not in use or during electrical storms.
- Do not attempt to disassemble, modify, or repair the adapter. Refer all servicing to qualified personnel.
- Ensure proper ventilation around the adapter during use. Do not cover it with cloths or other materials.
3. Package Contents
Please check the package contents upon opening:
- 1 x Kircuit USB-C 5V AC/DC Adapter
- 2 x USB Cable
4. Setup
Follow these steps to set up your Kircuit USB-C 5V AC/DC Adapter:
- Connect the USB-C end of the provided cable to the USB-C input port on your compatible device (e.g., LIVAROCI U81Q U80Q Blood Pressure Monitor).
- Connect the USB-A end of the cable to the USB-A output port on the Kircuit AC/DC Adapter.
- Plug the Kircuit AC/DC Adapter into a standard 100V-240V AC electrical wall outlet.
5. Operating Instructions
Once connected to a power outlet and your device, the adapter will begin supplying power or charging your device's battery automatically. The adapter is designed for continuous use within its specified voltage range.
The adapter features built-in dynamic IC, charger IC, and power fuse for rapid charging and overcharge protection, ensuring safe and efficient operation for your device.
6. Maintenance
To ensure the longevity and proper functioning of your adapter, follow these maintenance guidelines:
- Keep the adapter clean and dry.
- Wipe the surface with a soft, dry cloth. Do not use liquid or abrasive cleaners.
- Store the adapter in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
- Avoid bending or crimping the power cord excessively.
7. Troubleshooting
If you encounter issues with your Kircuit USB-C 5V AC/DC Adapter, please refer to the following common problems and solutions:
- Device not powering on or charging: Ensure the adapter is securely plugged into a working electrical outlet. Verify that the USB cable is firmly connected to both the adapter and your device. Confirm that your device is compatible with a 5V DC power supply.
- Adapter feels excessively hot: It is normal for the adapter to feel slightly warm during operation. If it becomes excessively hot to the touch or emits a burning smell, immediately disconnect it from the power outlet and your device. Do not use it again and contact support.
- Intermittent power supply: Check all connections to ensure they are secure. Try using a different electrical outlet. Inspect the USB cable for any visible damage.
8. Specifications
| Feature | Description |
|---|---|
| Brand | Kircuit |
| Model | USB-C 5V AC/DC Adapter |
| Input Voltage | 100-240V AC |
| Output Voltage | 5V DC |
| Connector Type (Adapter) | USB-A (Output) |
| Connector Type (Cable) | USB-A to USB-C |
| Compatible Devices | LIVAROCI U81Q, U80Q Blood Pressure Monitor |
| Color | Black |
| Special Features | 100% Brand New, High Quality AC/DC Power Charger (non-OEM), Built-in Dynamic IC, Charger IC & Power fuse for rapid charging and overcharge protection. |
| Manufacturer | Shenzhen Waweis Technology Co., Ltd |
9. Warranty and Support
This product comes with a standard manufacturer's warranty. Please refer to your purchase documentation or the product listing for specific warranty terms and duration.
For technical support, troubleshooting assistance, or warranty claims, please contact the seller or manufacturer directly through the platform where the product was purchased. Provide your order details and a clear description of the issue to facilitate a quicker resolution.