1. Introduction
The FLRONGSUN HJDZ-1210 AC to DC Converter is designed to convert standard household alternating current (AC) from 100V-240V to direct current (DC) 12V, providing a 10A (120W max) output through a car cigarette lighter socket. This allows you to power various 12V car-powered devices and appliances in your home, office, or other indoor environments.
2. Safety Information
Please read and understand all safety instructions before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Power Rating: Do not use this converter with devices that have a rated power greater than 120W or draw more than 10A. Exceeding these limits can damage the converter and the connected device.
- Voltage Stability: Avoid using the converter in environments with extremely unstable voltage, as this may cause damage.
- Unplug When Not in Use: Always unplug the power cord from the wall outlet when the converter is not in use.
- Ventilation: Ensure the product is used in an environment with good heat dissipation to prevent overheating. Do not cover the converter during operation.
- Protection Features: The converter is equipped with multiple safety protections, including over-voltage, over-current, short-circuit, and over-temperature protection.
- Indoor Use Only: This product is designed for indoor use and is not waterproof. Avoid exposure to moisture or liquids.
3. Package Contents
Verify that all items are present in the package:
- 1 x FLRONGSUN HJDZ-1210 AC to DC Converter Unit
- 1 x AC Power Cord (for wall outlet connection)
- 1 x DC Cigarette Lighter Socket Output Cable
4. Product Overview
The FLRONGSUN HJDZ-1210 converter features a compact design with essential components for safe and efficient power conversion.

The main unit (power brick) converts the AC input to 12V DC. It includes an input port for the AC power cord and an integrated output cable terminating in a standard car cigarette lighter socket. A small LED indicator on the unit illuminates when power is supplied.



5. Setup Instructions
Follow these steps to set up your AC to DC converter:
- Connect AC Power Cord: Insert the AC power cord into the input port on the converter unit.
- Plug into Wall Outlet: Plug the other end of the AC power cord into a standard 100V-240V household wall outlet. The LED indicator on the converter unit should illuminate, indicating it is receiving power.
- Connect Car Device: Insert the cigarette lighter plug of your 12V car device into the cigarette lighter socket on the converter's output cable.
Once connected, your car device should be ready for operation.
6. Operating Instructions
After successful setup, operate your 12V car devices as follows:
- Ensure the converter is properly plugged into a wall outlet and its indicator light is on.
- Connect your 12V car device (e.g., tire inflator, car vacuum cleaner, car refrigerator) to the converter's cigarette lighter socket.
- Activate your car device according to its own operating instructions.
- Always ensure the total power consumption of the connected device(s) does not exceed 120W.


7. Maintenance
To ensure the longevity and proper functioning of your converter:
- Keep the unit clean and free from dust. Use a soft, dry cloth for cleaning.
- Store the converter in a cool, dry place when not in use.
- Avoid dropping the unit or subjecting it to strong impacts.
- Do not attempt to open or repair the unit yourself. Refer to qualified personnel for service.
8. Troubleshooting
If you encounter issues with your converter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Converter not powering on (no LED light) | No power from wall outlet; AC cord not fully connected. | Check wall outlet with another device; ensure AC cord is securely plugged into both the converter and the wall. |
| Connected device not working | Device power consumption exceeds 120W/10A; device not properly connected; device malfunction. | Verify device's power rating; ensure cigarette lighter plug is fully inserted; test device with a car's cigarette lighter socket to rule out device malfunction. |
| Converter feels excessively hot | Overload; poor ventilation. | Unplug immediately. Reduce load by using a lower-power device; ensure converter is in a well-ventilated area and not covered. |
9. Specifications
Detailed technical specifications for the FLRONGSUN HJDZ-1210 AC to DC Converter:
| Feature | Specification |
|---|---|
| Model Number | HJDZ-1210 |
| Input Voltage | 100V-240V AC |
| Output Voltage | 12V DC |
| Output Current | 10 Amps (Max) |
| Wattage | 120 Watts (Max) |
| Product Dimensions | 6.6 x 2.6 x 1.6 inches |
| Item Weight | 1.13 pounds |
| Color | Black |
| Special Feature | Travel (implies portability, not for outdoor use) |
10. Warranty and Support
FLRONGSUN provides a 3-year warranty for replacement of this product. Additionally, technical support is available for the lifetime of the product. For any inquiries or assistance, please contact FLRONGSUN customer service through your purchase platform.