1. Introduction
Thank you for choosing the ASAKUKI 500mL Essential Oil Diffuser. This ultrasonic aromatherapy device is designed to enhance your environment with soothing aromas and gentle humidification. It features a large water tank, customizable LED lighting, multiple mist modes, and an automatic safety shut-off. This manual provides detailed instructions for safe and effective use of your diffuser.

This image displays the ASAKUKI 500mL essential oil diffuser, a white, rounded device with a wood-grain base, accompanied by six small bottles of essential oils (Tea Tree, Lemongrass, Lavender, Eucalyptus, Sweet Orange, Peppermint).
2. Safety Warnings
- Avoid direct skin contact with undiluted essential oils.
- Keep the diffuser and essential oils out of reach of children and pets.
- Ensure adequate ventilation in the room during use.
- Do not use the diffuser near water sources or flammable materials.
- Always turn off and unplug the diffuser before cleaning or moving it.
- Do not exceed the maximum water fill line.
- Use only clean, fresh tap water or distilled water.
3. Package Contents
Your ASAKUKI 500mL Essential Oil Diffuser package includes:
- 1 x ASAKUKI 500mL Essential Oil Diffuser
- 1 x AC Power Adapter
- 6 x 10ml Bottles of Essential Oils (Lavender, Peppermint, Eucalyptus, Tea Tree, Lemongrass, Sweet Orange)
- 1 x User Manual

A visual representation of the six 100% pure essential oils included: Tea Tree, Sweet Orange, Lemongrass, Eucalyptus, Lavender, and Peppermint, each with a brief description of its common uses.
4. Product Features
- 5-in-1 Multifunction Aroma Diffuser: Combines aromatherapy diffuser, humidifier, air purifier, ionizer, and night light functions.
- Large 500ml Water Tank: Provides extended misting time, up to 16 hours of continuous operation.
- Ultrasonic Mist Technology: Produces a fine, cool mist without heat, preserving the integrity of essential oils.
- Adjustable Mist Modes: Two levels of silent ultrasonic mist function.
- Timer Settings: Includes various timer options for diffusion duration.
- 7 LED Light Colors: Features 7 types of LED colors with dark, bright, and luminous functions, offering 14 total light options.
- Automatic Safety Shut-off: Prevents overheating when the water tank is empty.
- BPA-Free Material: Constructed from high-quality, safe, and environmentally friendly PP material.
- Quiet Operation: Operates at less than 25dB, suitable for bedrooms and nurseries.

This image illustrates the diffuser's capability to display 7 different LED mood light colors, showcasing the auto color changing, adjustable brightness, and fixed color modes.

The image highlights the large 500ml water tank, allowing the diffuser to operate for up to 16 hours, making it suitable for overnight use without refilling.
5. Setup
- Placement: Place the diffuser on a flat, stable, and dry surface away from direct sunlight or heat sources.
- Remove Cover: Gently remove the top cover of the diffuser.
- Add Water: Fill the 500ml water tank with clean, fresh tap water or distilled water up to the maximum fill line. Do not overfill.
- Add Essential Oils: Add 2 to 3 drops of your preferred essential oil directly into the water tank. Adjust the quantity based on personal preference and room size.
- Replace Cover: Securely place the top cover back onto the diffuser.
- Connect Power: Plug the AC power adapter into the diffuser's power input, then plug the adapter into a standard electrical outlet.
6. Operating Instructions
Mist Control
- Press the MIST button once for continuous mist.
- Press the MIST button a second time for intermittent mist (e.g., 30 seconds on, 30 seconds off).
- Press the MIST button a third time to turn off the mist function.
Timer Settings
- While the mist is on, press the TIMER button to cycle through available timer options (e.g., 1 hour, 3 hours, 6 hours, continuous). The indicator light will show the selected duration.
LED Light Control
- Press the LIGHT button once to turn on the LED light. It will cycle through colors automatically.
- Press the LIGHT button again to fix the light to a specific color. Continue pressing to cycle through the 7 available colors.
- Press and hold the LIGHT button to adjust the brightness (bright/dim) of the current color.
- Press the LIGHT button for a few seconds to turn off the LED light.
7. Maintenance
Regular cleaning ensures optimal performance and extends the lifespan of your diffuser.
- Empty Water: Turn off and unplug the diffuser. Remove the cover and carefully empty any remaining water from the tank.
- Clean Tank: Use a soft cloth or brush to gently wipe the inside of the water tank. For stubborn residue, use a small amount of mild dish soap or white vinegar diluted with water.
- Clean Ultrasonic Plate: Gently wipe the ultrasonic vibration plate (the small disc at the bottom of the tank) with a cotton swab dipped in white vinegar. Do not scrub or use abrasive materials.
- Rinse and Dry: Rinse the tank thoroughly with clean water, ensuring no soap or vinegar residue remains. Wipe all parts dry with a clean cloth.
- Frequency: Clean the diffuser after every 5-6 uses or every 3-5 days, especially when changing essential oils.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or low mist output | Insufficient water; water level too high; ultrasonic plate dirty; fan blocked. | Add water to appropriate level; ensure water is below max line; clean ultrasonic plate; check for obstructions. |
| Diffuser not turning on | No power; adapter not connected properly; diffuser damaged. | Check power connection; ensure adapter is fully plugged in; contact support if damaged. |
| Water leaking | Overfilled water tank; cover not properly sealed; diffuser placed on uneven surface. | Reduce water level; ensure cover is securely in place; place diffuser on a flat surface. |
| Weak or no aroma | Not enough essential oil; poor quality essential oil; large room size. | Add more essential oil; use high-quality oils; consider using multiple diffusers for larger spaces. |
9. Specifications
- Model Name: ASK-CQDE0103
- Item Model Number: CQDE0103
- Brand: ASAKUKI
- Capacity: 500 Milliliters
- Material: PP, ABS, BPA-free
- Power Source: AC adapter
- Product Dimensions (L x W x H): 16.8 x 13 x 13 cm (6.6 x 5.1 x 5.1 inches)
- Item Weight: 940 grams (2.07 lbs)
- Special Feature: Rotational (likely referring to light or mist direction, though not explicitly detailed)
- Recommended Coverage Area: 40 square meters

This image emphasizes the diffuser's quiet operation (below 25dB) and safety features, including BPA-free materials and automatic shut-off when water runs out, making it suitable for use around light sleepers and babies.
10. Warranty and Support
ASAKUKI provides a 1-year technical support for this essential oil diffuser. For any questions, concerns, or technical assistance, please contact ASAKUKI customer support through the retailer's platform or the official ASAKUKI website. Please have your model number (CQDE0103) and purchase information ready when contacting support.





