1. Introduction
Thank you for choosing the Hajomel ATJ015 Portable Cordless Tire Inflator. This device is designed for convenient and efficient inflation of various items, including car tires, motorcycle tires, bicycle tires, and sports balls. Featuring a powerful battery, digital pressure gauge, and automatic shut-off, it provides reliable performance and ease of use. Please read this manual thoroughly before operation to ensure safe and correct usage.
2. Safety Instructions
- Always keep the device away from children.
- Do not operate the inflator in wet conditions or near flammable liquids or gases.
- Ensure the correct pressure setting for the item being inflated to prevent over-inflation, which can cause damage or injury. Refer to the item's manufacturer recommendations.
- Do not leave the inflator unattended during operation.
- Avoid prolonged continuous operation. Allow the device to cool down after 10-15 minutes of continuous use to prevent overheating.
- Use only the provided charging cable and accessories.
- If the device shows signs of damage, do not use it. Contact support.
3. Package Contents
- Hajomel ATJ015 Portable Cordless Tire Inflator
- Air Hose
- Various Nozzle Adapters (e.g., Presta valve adapter, ball needle)
- USB Charging Cable
- User Manual
4. Product Overview
Familiarize yourself with the components and controls of your Hajomel ATJ015 inflator.

Figure 1: Front view of the Hajomel ATJ015 inflator, showing the digital display, mode indicators, battery level, and control buttons.
Controls and Display:
- Digital Display: Shows current pressure, target pressure, battery level, and selected mode.
- Power Button (⏻): Press and hold to turn on/off. Short press to start/stop inflation.
- Mode Button (⚙): Cycles through preset inflation modes (Car, Motorcycle, Bicycle, Ball, Custom).
- Unit Button (↺): Changes pressure units (PSI, BAR, KPA, Kg/cm²).
- LED Light Button (💡): Toggles the built-in LED flashlight.
- +/- Buttons: Adjust target pressure values.
5. Setup
5.1 Charging the Device
- Before first use, fully charge the inflator.
- Connect the USB charging cable to the charging port on the device and to a suitable USB power adapter (not included).
- The battery indicator on the digital display will show charging status. It is fully charged when the indicator shows full.
5.2 Attaching the Air Hose and Nozzle
- Screw the air hose securely into the inflation port on the top of the device.
- Select the appropriate nozzle adapter for the item you wish to inflate and screw it onto the other end of the air hose.
6. Operating Instructions
6.1 Power On/Off
- To turn on: Press and hold the Power Button (⏻) for 2-3 seconds. The digital display will light up.
- To turn off: Press and hold the Power Button (⏻) for 2-3 seconds. The display will turn off. The device will also automatically shut off after a period of inactivity.
6.2 Selecting Inflation Mode and Pressure Unit

Figure 2: Display showing various preset inflation modes and their typical pressure ranges.
- After powering on, press the Mode Button (⚙) repeatedly to cycle through the preset modes: Car, Motorcycle, Bicycle, Ball, and Custom. Each mode has a default pressure range.
- Press the Unit Button (↺) to switch between pressure units: PSI, BAR, KPA, and Kg/cm².
6.3 Setting Target Pressure
- Once a mode is selected, the target pressure will flash on the display.
- Use the + and - buttons to adjust the target pressure to your desired value. Refer to the item's manufacturer recommendations for correct pressure.
- The device will automatically save the last set pressure for each mode.
6.4 Inflation Process

Figure 3: The inflator connected to a car tire, demonstrating its use for rapid inflation.
- Connect the nozzle adapter firmly to the valve stem of the item to be inflated. The display will show the current pressure.
- Verify that the current pressure matches the item's actual pressure.
- Press the Power Button (⏻) to start inflation. The inflator will begin pumping air, and the display will show the real-time pressure increase.
- The device will automatically stop when the target pressure is reached.
- If you need to stop inflation manually, press the Power Button (⏻) again.
- Carefully disconnect the nozzle from the valve stem. A small amount of air may escape, which is normal.
6.5 Using the LED Light
Press the LED Light Button (💡) to turn the built-in flashlight on or off. This is useful for nighttime use or in low-light conditions.
6.6 Power Bank Function (if applicable)
Some models of this inflator may include a power bank function. If available, connect your USB-powered device to the designated USB output port on the inflator to charge it.
7. Maintenance
- Cleaning: Wipe the exterior of the inflator with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners. Ensure no water enters the device.
- Storage: Store the inflator in a cool, dry place, away from direct sunlight and extreme temperatures. Keep it out of reach of children.
- Battery Care: For optimal battery life, charge the device at least once every three months, even if not in use. Avoid fully discharging the battery frequently.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Low battery or device is off. | Charge the device fully. Press and hold the Power Button for 2-3 seconds. |
| Inflator stops before reaching target pressure. | Battery low or hose/nozzle not securely connected. | Recharge the device. Ensure all connections are tight. |
| Inaccurate pressure reading. | Loose connection or device malfunction. | Ensure the nozzle is firmly attached to the valve. If problem persists, contact support. |
| Device overheats. | Prolonged continuous use. | Allow the device to cool down for at least 15 minutes before resuming use. |
9. Specifications
| Model Name: | ATJ015 |
| Brand: | Hajomel |
| Power Source: | Battery Powered |
| Voltage: | 12 Volts |
| Maximum Operating Pressure: | 150 PSI |
| Sound Level: | 3 Decibels |
| Special Feature: | Automatic Shut-Off |
| Item Weight: | 476 g |
| Included Components: | Nozzle (and other standard accessories) |
10. Warranty and Support
Hajomel products are manufactured to high-quality standards. For warranty information or technical support, please refer to the warranty card included with your purchase or contact the retailer where the product was purchased. Please have your model number (ATJ015) and purchase details ready when contacting support.
For further assistance, please visit the official Hajomel website or contact customer service through your purchase platform.