LONCIN DQ702
Essential Oil Diffuser User Manual
Model: DQ702 | Brand: LONCIN
1. Introduction
Thank you for purchasing the LONCIN Essential Oil Diffuser. This ultrasonic diffuser combines aromatherapy, humidification, and ambient lighting to create a relaxing and pleasant environment. Please read this manual carefully before use to ensure proper operation and maintenance.
2. Safety Information
- Use only the specified power adapter (DC 5V/1.0A or greater) to avoid affecting performance or causing damage.
- Do not exceed the maximum water level indicated inside the water tank.
- Do not pour water into the mist outlet.
- Keep the diffuser out of reach of children and pets.
- Unplug the device before cleaning or refilling.
- Do not disassemble or attempt to repair the device yourself. Contact customer support if issues arise.
- Ensure the diffuser is placed on a stable, flat surface away from direct sunlight or heat sources.
3. Package Contents
- Essential Oil Diffuser Unit
- Type-C Power Cable
- User Manual
4. Product Overview

Front view of the LONCIN Essential Oil Diffuser, showcasing its elegant design with a realistic candlelight effect and a gentle mist rising from the top.

Illustration of the diffuser's single button control: short press for mist, long press for lighting.

Key features of the diffuser including aromatherapy, ultrasonic atomization, quiet operation, simulation candlelight, power-off protection, and essential oil compatibility.

Additional features highlighted: Type-C charging, 150ml capacity, night light function, and ease of cleaning.
5. Setup
- Unpack: Carefully remove the diffuser and all accessories from the packaging.
- Place: Position the diffuser on a flat, stable surface. Ensure it is not near any heat sources or in direct sunlight.
- Remove Cover: Gently lift the top cover of the diffuser.
- Add Water: Fill the water tank with clean tap water up to the maximum water level line (150ml capacity). Do not overfill.
- Add Essential Oils: Add 2-3 drops of your preferred essential oil directly into the water tank. Adjust the amount based on your preference.
- Replace Cover: Securely place the top cover back onto the diffuser.
- Connect Power: Connect the Type-C power cable to the diffuser's port and plug the other end into a compatible DC 5V/1.0A (or greater) USB power adapter.

Step-by-step image showing how to add water to the diffuser's base.
6. Operating Instructions
The diffuser features a single multi-function button for easy control.
- Mist Function:
- Short press the button once to turn on the mist.
- Short press the button a second time to turn off the mist.
- Lighting Function:
- Long press the button to turn on the ambient candlelight effect.
- Long press the button a second time to turn off the light.
Note:
- The diffuser has a built-in smart chip for water shortage protection. It will automatically shut down when the water level is low to ensure safety and extend device life.
- When first turned on, it may take a few seconds for the ultrasonic diffusion to produce mist. You can feel a faint cool mist by placing your palm over the mist outlet, indicating it is working.

The diffuser in operation, emitting a gentle mist and glowing with its warm candlelight effect.

The diffuser is designed for quiet operation, functions as a night light, and includes an auto shut-off feature for safety.
7. Maintenance
Regular cleaning is essential for optimal performance and longevity of your diffuser.
- Daily Cleaning: After each use, empty any remaining water from the tank. Wipe the inside of the tank with a clean, soft cloth.
- Weekly Cleaning:
- Unplug the diffuser and remove the cover.
- Empty the water tank completely.
- Add a small amount of white vinegar (about 1 teaspoon) to the water tank and let it sit for 5-10 minutes to loosen mineral buildup.
- Gently wipe the inside of the tank and the ultrasonic disc with a soft brush or cotton swab. Do not scrub aggressively.
- Rinse the tank thoroughly with clean water, ensuring no vinegar residue remains.
- Wipe the exterior of the diffuser with a soft, damp cloth.
- Allow all parts to air dry completely before reassembling or storing.
- Important: Do not use corrosive detergents or harsh chemicals. Do not immerse the base unit in water.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or weak mist |
|
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| No power/Light not working |
|
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| Unusual noise |
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9. Specifications
| Feature | Detail |
|---|---|
| Brand | LONCIN |
| Model Name | DQ702 |
| Color | Black |
| Capacity | 150 Milliliters |
| Product Dimensions | 3.74"L x 3.74"W x 5.91"H |
| Item Weight | 9.9 ounces (0.28 Kilograms) |
| Power Source | Corded Electric |
| Wattage | 12 watts |
| Special Features | Automatic Shut-Off, Cool Mist, Realistic Candlelight Effect |
| Material | Acrylonitrile Butadiene Styrene (ABS), Polypropylene (PP), BPA Free |
| Recommended Uses | Home, Nursery, Office, Vehicle |
| Manufacturer | KINEATHER |
| UPC | 658359434870 |
10. Warranty and Support
This product comes with a standard manufacturer's warranty. For specific warranty details, please refer to the product packaging or contact the retailer where you purchased the item.
If you encounter any issues or have questions regarding your LONCIN Essential Oil Diffuser, please contact our customer support team for assistance. Provide your model number (DQ702) and a detailed description of the issue when contacting support.
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