1. Introduction
Thank you for purchasing the Moon Meteor-X AUTO USB Rechargeable Bicycle Headlight. This manual provides important information on the proper installation, operation, and maintenance of your new light. Please read it thoroughly before use and retain it for future reference.
The Meteor-X AUTO is designed to enhance your visibility and illuminate your path during cycling, featuring a powerful 450-lumen output, multiple lighting modes, and an intelligent auto-switch function for convenience.
2. Package Contents
Please check the package contents to ensure all items are present:
- Moon Meteor-X AUTO Headlight Unit
- Handlebar Mounting Bracket
- USB Charging Cable
- User Manual (this document)
3. Setup
3.1 Initial Charge
Before first use, fully charge the Meteor-X AUTO headlight. Connect the supplied USB cable to the light's charging port and to a USB power source (e.g., computer, USB wall adapter). The charging indicator will show the charging status.
Charging time may vary depending on the power source.
3.2 Mounting the Headlight
The Meteor-X AUTO headlight comes with a handlebar mounting bracket suitable for handlebars with a diameter of 0.9 - 1.4 inches (22 - 35 mm).
- Securely attach the mounting bracket to your bicycle's handlebar. Ensure it is positioned centrally and does not obstruct other controls.
- Slide the Meteor-X AUTO headlight onto the bracket until it clicks firmly into place.
- Adjust the angle of the light to ensure optimal illumination of your path without blinding oncoming traffic.

Figure 1: The Moon Meteor-X AUTO Headlight mounted on a bicycle handlebar. The image shows the compact black light unit attached to a standard handlebar, illustrating its position and orientation for optimal road illumination.
4. Operation
4.1 Power On/Off and Mode Selection
The Meteor-X AUTO features a single button for power control and mode cycling.
- To Power On: Press and hold the power button for approximately 1 second.
- To Change Modes: Briefly press the power button to cycle through the available lighting modes.
- To Power Off: Press and hold the power button for approximately 1 second.
4.2 Lighting Modes and Run Times
The light offers various modes to suit different riding conditions:
- Continuous Lighting:
- 450 Lumens: 2 hours 30 minutes
- 230 Lumens: 5 hours 15 minutes
- 120 Lumens: 10 hours
- Flash Modes:
- 60 Lumens Flash: 90 hours
- 200 Lumens Flash: 45 hours
- 500 Lumens DAY Flash: 78 hours
- SOS: 47 hours
4.3 Auto Switch Function
The Meteor-X AUTO features an intelligent auto-switch function. When enabled, the light will automatically turn on in low-light conditions (e.g., entering a tunnel) and turn off when sufficient ambient light is detected. This function helps conserve battery life and provides convenience.
Refer to the product's quick start guide or packaging for specific instructions on enabling/disabling the auto-switch function, if not detailed here.
5. Charging
The Meteor-X AUTO is equipped with a USB rechargeable battery. To charge:
- Locate the USB charging port on the light unit.
- Connect the provided USB cable to the light and to a standard USB power source (e.g., computer, wall adapter, power bank).
- The charging indicator light will illuminate to show charging status. Typically, a red light indicates charging, and a green or blue light indicates a full charge.
- Once fully charged, disconnect the USB cable.
Note: Do not leave the light charging unattended for extended periods. Use only the provided or a certified USB cable.
6. Maintenance
6.1 Cleaning
Wipe the light unit with a soft, damp cloth to remove dirt and debris. Do not use abrasive cleaners or solvents, as these can damage the casing or lens.
6.2 Battery Care
To prolong battery life:
- Avoid fully discharging the battery frequently.
- Charge the battery at least once every three months if not in regular use.
- Store the light in a cool, dry place away from direct sunlight.
6.3 Water Resistance
The Meteor-X AUTO is rated IPX4 for water resistance, meaning it is protected against splashing water from any direction. It is suitable for use in rainy conditions but should not be submerged in water.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on. | Battery is depleted. | Charge the light fully using the USB cable. |
| Light turns off unexpectedly. | Low battery. | Recharge the battery. |
| Light modes are not cycling. | Button malfunction or temporary software glitch. | Try pressing the button firmly. If issue persists, fully discharge and recharge the light to reset. |
| Auto-switch function not working. | Sensor obstructed or function disabled. | Ensure the light sensor is clean and unobstructed. Check product documentation for how to enable/disable the auto-switch. |
If you encounter issues not listed here, please contact customer support.
8. Specifications
- Model: 78109000
- Brightness: Up to 450 Lumens
- Lighting Modes: Continuous (450lm, 230lm, 120lm), Flash (60lm, 200lm, 500lm DAY Flash), SOS
- Battery: USB Rechargeable
- Water Resistance: IPX4 (Life Waterproof)
- Mounting: Handlebar Mount (0.9 - 1.4 inches / 22 - 35 mm diameter)
- Body Size: 3.5 x 1.3 x 1.3 inches (88 x 30 x 34 mm)
- Weight: Approximately 3.0 oz (85 g)
- Auto Switch Function: Yes
- Material: Other (as per product specifications)
- Color: Black
9. Warranty & Support
This product comes with a standard manufacturer's warranty. Please refer to the warranty card included with your purchase or visit the official Moon website for detailed warranty terms and conditions.
For technical support, replacement parts, or any inquiries regarding your Moon Meteor-X AUTO headlight, please contact Moon customer service through their official website or the retailer where you purchased the product.





