1. Introduction
This instruction manual provides essential information for the safe and effective use of your IOKOFJOA 12V AC Charger Adapter. This adapter is specifically designed as a replacement power source for compatible EMSON Bullseye Pro Tire Inflators. Please read this manual thoroughly before using the product and retain it for future reference.
2. Product Overview and Features
The IOKOFJOA 12V AC Charger Adapter is a reliable power solution for your portable tire inflator. It features a durable design and incorporates multiple safety protections to ensure secure operation.

Image 2.1: The IOKOFJOA 12V AC Charger Adapter with its power cord.
Key Features:
- Output: 12V, ensuring compatibility with specified tire inflators.
- Input: 100-240V (Worldwide Compliant), allowing for versatile use.
- Cable Length: Extra-long 180cm (5.9 ft) power cord for convenience.
- Safety Certifications: CE, FCC, RoHS certified.
- Multi-Protection System: Built-in safeguards against over-voltage, over-load, over-current, over-heat, and short-circuit.
- Durable Construction: Features a PVC material power cord and robust plug design.
- Power Indicator: A green light indicates charging status.

Image 2.2: Detailed view of the charger's power cord and compatible charger jack.

Image 2.3: Overview of the charger's reliable protection features, including over-temperature, over-current, short circuit, overcharge, overpower, and overvoltage protection.

Image 2.4: Visual representation of the charger's standard plug, durable power cord, and the power indicator light.
3. Compatibility
This charger adapter is specifically designed to be compatible with the following EMSON Bullseye Pro Tire Inflator models:
- EMSON 1745 Bullseye Pro Tire Inflator
- EMSON 9475 Bullseye Pro Tire Inflator
- EMSON 2441 Bullseye Pro Tire Inflator
Important Note:
This adapter is only suitable for replacing 12V power adapters. It is not compatible with 5V, 9V, or 15V devices. Please verify the voltage requirements of your device before use.

Image 3.1: Visual guide to compatible Bullseye Tire Inflator models.
4. Setup
Setting up your IOKOFJOA 12V AC Charger Adapter is straightforward:
- Ensure your Bullseye Pro Tire Inflator is turned off.
- Locate the charging port on your tire inflator.
- Insert the DC output plug of the IOKOFJOA charger adapter into the charging port of your tire inflator. The charger jack is designed for a perfect match with the original plug.
- Plug the AC input prongs of the charger adapter into a standard 100-240V AC wall outlet.
- Observe the power indicator light on the charger. A green light indicates that the charger is receiving power and is ready for operation or charging.

Image 4.1: The 12V charger adapter connected to a Bullseye tire inflator, ready for use.
5. Operating Instructions
Once the charger is properly connected to both the power outlet and your tire inflator, it will begin to supply power or charge the device. The operation is automatic.
- The green indicator light on the charger signifies that it is active and functioning correctly.
- Refer to your specific Bullseye Pro Tire Inflator's manual for details on its charging indicators and battery status.
- Always ensure the charger is placed in a well-ventilated area during operation to prevent overheating.
6. Maintenance
Proper maintenance will extend the life of your charger adapter:
- Cleaning: Disconnect the charger from all power sources before cleaning. Use a soft, dry cloth to wipe the surface. Do not use liquid cleaners or abrasive materials.
- Storage: Store the charger in a cool, dry place away from direct sunlight and extreme temperatures. Avoid tightly winding the power cord to prevent damage.
- Handling: Do not drop, disassemble, or attempt to repair the charger yourself. This can void the warranty and pose safety risks.
- Cable Care: Regularly inspect the power cord for any signs of damage, such as fraying or cuts. If damage is found, discontinue use immediately and replace the charger.
7. Troubleshooting
If you encounter issues with your charger adapter, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger not powering device / No indicator light |
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| Device not charging fully or slowly |
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| Charger feels hot during use |
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8. Specifications
| Specification | Value |
|---|---|
| Model Number | DX 12V -10090 |
| Input Voltage | 100-240V AC |
| Output Voltage | 12V |
| Output Current | 1 Amps |
| Wattage | 12 watts |
| Power Cord Length | 180 cm (5.9 ft) |
| Connector Type | 2-Pin |
| Item Weight | 3.38 ounces |
| Package Dimensions | 4.13 x 2.76 x 1.57 inches |
| Included Components | 1 x 2-Pin Power Cable |

Image 8.1: Dimensions of the IOKOFJOA 12V AC Charger Adapter and its power cord length.
9. Warranty and Support
Your IOKOFJOA 12V AC Charger Adapter comes with a commitment to quality and customer satisfaction:
- Refund Policy: 30 Days Refund.
- Exchange Policy: 12 Months Exchange.
- Customer Service: We offer friendly after-sale service. Please do not hesitate to contact us at any time if you require assistance while using this charger.
For support, please refer to the contact information provided with your purchase or visit the official IOKOFJOA store on Amazon: IOKOFJOA Amazon Store.