1. Safety Information
Please read all safety instructions carefully before using the SOICARE Car Essential Oil Diffuser. Retain this manual for future reference.
- Do not leave the device unattended while in use.
- Although the device features an automatic shut-off, avoid using essential oils near open flames or certain electrical appliances.
- Keep the device out of reach of children and pets.
- The diffuser is powered by a USB 3.0 port/hub with an output of 5V 1A. Ensure the power source meets these specifications.
- The device includes a low water level shut-off feature to prevent dry burning.
- The well-sealed design provides spill-proof protection, making it safe for use near laptops, desktops, and in vehicles.
- Use light essential oils to protect the machine and for optimal olfactory health.
2. Product Overview
The SOICARE Car Essential Oil Diffuser is a compact and portable aromatherapy device designed for use in various environments, including vehicles, offices, and homes. It utilizes ultrasonic vibrations to produce a fine mist, dispersing essential oils into the air.

Image: The SOICARE Car Essential Oil Diffuser in elegant black, showcasing its sleek design.
Key Features:
- Ultrasonic Technology: Produces a fine, consistent mist for effective essential oil diffusion.
- Compact and Portable: Designed to fit in vehicle cup holders and easily carried for travel.
- Dual Power Buttons: Features power buttons on both the USB cord and the unit's base for convenient operation.
- Built-in USB Cable: Includes a retractable USB cord organizer at the bottom.
- Color-Changing LED Lights: Provides ambient lighting with a ring of color-changing lights.
- Automatic Shut-off: Activates when water levels are low to ensure safety.
3. Setup and First Use
Follow these steps to set up your SOICARE Car Essential Oil Diffuser:
- Open the Diffuser: Hold the bottom of the diffuser with one hand and gently rotate the top cover counter-clockwise with the other hand to remove it.
- Add Water: Fill the water tank with clean water. Do not exceed the maximum fill line marked "MAX" inside the reservoir. The capacity is 60 milliliters.
- Add Essential Oil: Add a few drops of your preferred essential oil directly into the water tank.
- Close the Diffuser: Replace the top cover by aligning it and rotating clockwise until securely closed.
- Connect Power: Plug the built-in USB cable into a compatible USB 3.0 port/hub (5V 1A output). The diffuser can be powered by various USB sources, including car chargers, power banks, or laptops.
- Power On: Press either the power button on the USB cord or the button on the base of the unit to turn on the diffuser.

Image: Visual guide demonstrating the four steps to prepare the diffuser for use: opening, adding water, adding essential oil, and powering on.

Image: The SOICARE diffuser positioned in a car's cup holder, actively diffusing essential oils.
4. Operating Instructions
Once set up, the diffuser is ready for operation. It features simple controls for mist and lighting.
Power On/Off:
- Press the power button on the unit's base or on the USB cord to turn the diffuser on or off.
- The diffuser will begin emitting mist and the color-changing LED lights will activate.
Mist Output:
The diffuser uses ultrasonic vibrations to produce a steady mist. This technology helps to fully resolve essential oils for consistent scent dispersion and can help maintain humidity in small spaces.
LED Lighting:
The diffuser features a ring of color-changing LED lights on the top. These lights cycle through 7 different colors, providing ambient illumination.

Image: An overview of the diffuser's user-friendly design, highlighting its color options, single button control, dual switches, and integrated USB cable.

Image: A display of several diffusers showcasing the variety of LED light colors available.

Image: The diffuser demonstrated in multiple environments, including a bedroom, office, and car interior.
5. Maintenance and Care
Proper maintenance ensures the longevity and optimal performance of your diffuser.
Cleaning the Reservoir:
- The reservoir is designed for easy cleaning without the need for cotton swabs.
- To clean, simply use a soft, damp cloth to wipe the interior of the water tank.
- Ensure the device is unplugged before cleaning.
Important Notes:
- The water level will naturally decrease as the diffuser operates. Do not add water above the horizontal scale marked "MAX".
- The machine will automatically shut off if the water level is too low or if the tank is empty.
- Regularly clean the reservoir to prevent essential oil residue buildup, which can affect performance.
6. Troubleshooting
If you encounter issues with your diffuser, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Diffuser does not turn on | No power, loose connection, or faulty USB port. | Ensure the USB cable is securely connected to a 5V 1A power source. Try a different USB port or power adapter. |
| No mist or weak mist | Insufficient water, water level too high, essential oil residue, or unit is tilted. | Check water level; refill if low (do not exceed MAX line). Clean the reservoir. Ensure the diffuser is on a flat, stable surface. |
| Automatic shut-off activates frequently | Low water level. | This is a safety feature. Refill the water tank when the water level is low. |
| Lights not working | Internal malfunction. | Ensure the unit is powered on. If the issue persists, contact customer support. |
7. Specifications
Detailed technical specifications for the SOICARE Car Essential Oil Diffuser:
| Feature | Detail |
|---|---|
| Brand | SOICARE |
| Model Name | USB02 |
| Color | Black |
| Power Source | USB Cable |
| Input Voltage | 5V 1A |
| Wattage | 5 watts |
| Capacity | 60 Milliliters |
| Product Dimensions | 2.99"L x 2.99"W x 5.04"H |
| Item Weight | 5.6 ounces (0.16 Kilograms) |
| Material | Polypropylene (PP), BPA Free |
| Special Features | Built-in USB Cord, Fits Cup Holder, Auto Shutoff, LED Lights |
| Coverage Area | Small room or Vehicle |
| Ultrasonic Vibration | 3.0MHZ |

Image: Visual representation of the diffuser's dimensions and key technical specifications.

Image: An exploded diagram illustrating the internal components and structure of the diffuser.
8. Warranty and Support
Warranty Information:
The SOICARE Car Essential Oil Diffuser comes with a 2-year warranty from the date of delivery. Please retain your proof of purchase for warranty claims.
Customer Support:
For any questions, technical assistance, or warranty claims, please contact SOICARE customer support through the retailer where the product was purchased.