1. Safety Instructions
Please read and understand all safety instructions before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Avoid direct skin contact with undiluted essential oils. Always dilute essential oils with water as instructed.
- Keep out of reach of children and pets. This device contains small parts and essential oils that can be harmful if ingested or misused.
- Ensure proper ventilation during use. Do not operate in enclosed spaces without adequate airflow.
- Use only the provided power adapter.
- Do not immerse the diffuser base in water or any other liquid.
- Always unplug the diffuser before cleaning or refilling.
- Do not block the mist outlet.
- If the diffuser emits an unusual smell, sound, or smoke, unplug it immediately and discontinue use.
2. Product Overview
The Vamoar VM-855 Essential Oil Diffuser is a versatile device designed to enhance your environment through aromatherapy and humidification. It combines modern design with advanced ultrasonic technology for quiet and efficient operation.
Key Features:
- Multifunction: Operates as an aromatherapy essential oil diffuser, cool mist humidifier, and night light.
- Large Capacity: 550ml water tank for extended operation.
- Ultrasonic Technology: Utilizes advanced ceramic ultrasonic technology for quiet mist diffusion.
- Timer Settings: Four adjustable timer modes: 1 hour, 3 hours, 6 hours, and continuous operation.
- Mist Control: Two mist options: strong and standard.
- Ambient Lighting: 7 mood lights with two intensity settings, offering 15 different light combinations.
- Automatic Shut-Off: Safety feature that turns off the diffuser when water levels are low.
- Included Essential Oils: Comes with a set of 10 pure essential oils for immediate use.
Product Components:
- Diffuser Base (with control buttons)
- Water Tank Cover
- Power Adapter
- Measuring Cup
- 10 Essential Oil Bottles

Figure 1: Vamoar VM-855 Essential Oil Diffuser with included essential oils.

Figure 2: Overview of Vamoar VM-855 Diffuser features.
3. Setup
- Place the Diffuser: Position the diffuser on a flat, stable surface away from direct sunlight, heat sources, and electronic devices.
- Remove the Cover: Gently lift the top cover of the diffuser.
- Connect Power: Plug the DC connector of the power adapter into the DC jack at the bottom of the diffuser base. Then, plug the power adapter into a standard wall outlet.
- Fill with Water: Use the provided measuring cup to fill the water tank with clean tap water. Do not exceed the maximum water level line (550ml).
- Add Essential Oils: Add 5-10 drops of your preferred essential oil directly into the water tank. Adjust the amount based on desired aroma intensity.
- Replace the Cover: Carefully place the top cover back onto the diffuser base, ensuring it is securely seated.
Video 1: Official Vamoar Essential Oil Diffuser setup and operation guide.
4. Operating Instructions
The Vamoar VM-855 diffuser features intuitive controls for mist, light, and timer settings.
Mist Control:
- Press the MIST button once to turn on the mist in standard mode.
- Press and hold the MIST button to switch between strong and standard mist output.
- To turn off the mist, cycle through the timer settings until no indicator light is on for mist.
Timer Settings:
- Press the MIST button repeatedly to select your desired operating time: 1 hour, 3 hours, 6 hours, or continuous (ON).
- The corresponding indicator light will illuminate to show the selected timer setting.
- The diffuser will automatically shut off when the selected time expires or when the water level is too low.
Light Control:
- Press the LIGHT button once to turn on the ambient lighting. The colors will cycle automatically.
- Press the LIGHT button repeatedly to cycle through the 7 available colors and 2 intensity settings (bright/dim) for a total of 15 light combinations.
- To fix the light on a specific color, press the LIGHT button until the desired color appears.
- To turn off the light, press and hold the LIGHT button for a few seconds until the light turns off.

Figure 3: The diffuser offers 7 mood lights and 15 light modes.

Figure 4: Diffuser operating in a bedroom, demonstrating mist and ambient light.
5. Maintenance
Regular cleaning and maintenance will ensure the longevity and optimal performance of your Vamoar VM-855 Essential Oil Diffuser.
Daily Maintenance:
- After each use, unplug the diffuser and empty any remaining water from the tank.
- Wipe the inside of the water tank with a clean, soft cloth.
Weekly Cleaning:
- Unplug the diffuser and remove the top cover.
- Drain any remaining water from the water tank.
- Add a small amount of warm water (not hot) and a few drops of neutral detergent to the tank.
- Gently wipe the inside of the tank and the ultrasonic plate with a soft brush or cotton swab.
- Rinse the tank thoroughly with clean water, ensuring no detergent residue remains.
- Wipe the exterior of the diffuser with a soft, dry cloth.
- Allow all parts to air dry completely before reassembling or storing.
Important: Do not use corrosive detergents or harsh chemicals. Do not submerge the diffuser base in water.

Figure 5: The wide top opening facilitates easy cleaning of the diffuser.
6. Troubleshooting
If you encounter any issues with your Vamoar VM-855 Essential Oil Diffuser, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or low mist output |
|
|
| Diffuser does not turn on |
|
|
| Unusual noise during operation |
|
|
| Light not working | Light function is off. | Press the LIGHT button to activate the lighting. |
7. Specifications
| Feature | Specification |
|---|---|
| Brand | Vamoar |
| Model Name | VM-855 (aromatherapy diffuser) |
| Capacity | 550 Milliliters |
| Product Dimensions | 6.93"L x 6.85"W x 6.77"H |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Power Source | Corded Electric |
| Wattage | 12 watts |
| Special Features | Automatic Shut-Off, Cool Mist, Multiple Light Setting, Timer Setting |
| Light Source Type | LED |
| Coverage | Medium to Large Room |
| Item Weight | 1.98 pounds |
8. Warranty and Support
For warranty information or technical support regarding your Vamoar VM-855 Essential Oil Diffuser, please contact the manufacturer directly. Refer to the product packaging or the official Vamoar website for contact details.
It is recommended to retain your purchase receipt as proof of purchase for any warranty claims.





