1. Product Overview
The URPOWER Upgraded 500ML Essential Oil Diffuser (Model OD-503) is a versatile ultrasonic aromatherapy device designed to enhance your environment. It functions as an aroma diffuser when used with essential oils, and as a humidifier to add moisture to dry air. Key features include a large 500ml water tank, multiple mist modes, adjustable light settings, and an automatic safety shut-off when water levels are low.

Image: The URPOWER 500ML Essential Oil Diffuser in its all-white finish.
2. Safety Information
- Always use the diffuser in a well-ventilated area.
- Keep out of reach of children and pets.
- Do not use near pets or in areas where smoking is occurring.
- Always turn off the diffuser when not in use or when leaving the room.
- Never add water above the 'MAX' line in the water tank.
- Avoid direct skin contact with essential oils. If contact occurs, rinse immediately with plenty of water and seek medical advice if irritation persists.
- Do not allow water to enter the air outlet.
3. Package Contents
Please check the package for the following items:
- URPOWER 500ML Essential Oil Diffuser Unit
- Power Adapter
- User Manual (this document)
4. Product Components and Controls

Image: Front view of the diffuser highlighting the Light, High/Low, and Mist buttons, along with product dimensions (6.5 inches L x 4.8 inches H).
- Light Button: Press to turn on the light. Cycle through changing colors, steady on a single color, or turn off the light.
- Mist Button: Press to choose the timer setting (60 mins, 120 mins, 180 mins, or ON). Long press to turn off the diffuser.
- High/Low Control: Adjusts the mist spray intensity. One beep indicates strong mist, two beeps indicate weak mist.
5. Setup Guide
- Place the diffuser on a flat, stable surface.
- Remove the top cover of the diffuser.
- Connect the AC adapter to the DC jack located at the bottom of the main body. Then plug the adapter into a power outlet.
- Fill the water tank with clean tap water up to the 'MAX' line. Do not overfill.
- Add 2-3 drops of your preferred essential oil per 100ml of water (essential oils are NOT INCLUDED). Adjust quantity based on desired aroma intensity.
- Replace the top cover securely.

Image: Step-by-step visual guide for connecting power, adding water and oil, and operating the mist and light functions.
6. Operation
6.1 Mist Control
- Press the "Mist" button to turn on the mist.
- Each press cycles through timer settings: 60 minutes, 120 minutes, 180 minutes, and ON (continuous mist).
- To adjust mist intensity, press the "High/Low" button. One beep indicates strong mist, two beeps indicate weak mist.
- To turn off the mist, long press the "Mist" button.
- The diffuser will automatically shut off when the water runs out.

Image: The diffuser operating, highlighting its whisper-quiet function and automatic shut-off safety feature.
6.2 Light Control
- Press the "Light" button to turn on the LED light.
- Each press cycles through 7 color changing modes, a single steady color, or turns the light off.
- The light can be used independently of the mist function.

Image: A display of multiple diffusers showcasing the 7 color changing LED light options.
7. Maintenance
Regular cleaning helps maintain optimal performance and extends the lifespan of your diffuser.
7.1 Cleaning the Water Tank
- Unplug the diffuser from the power outlet and remove the top cover.
- Pour out any remaining water from the 'DRAIN SIDE' of the tank.
- Wipe the inside of the water tank with a soft cloth or sponge.
- For deeper cleaning, add a small amount of white vinegar (about 1 tablespoon) to the tank and let it sit for 10-15 minutes.
- Drain the vinegar and rinse the tank thoroughly with clean water.
- Wipe dry with a soft cloth.
7.2 Cleaning the Ultrasonic Plate
- If mineral deposits accumulate on the ultrasonic plate (the small ceramic disc at the bottom of the tank), gently wipe it with a cotton swab dipped in white vinegar.
- Do not use harsh chemicals or abrasive materials, as this can damage the plate.
- Rinse thoroughly after cleaning.
7.3 Storage
When not in use for an extended period, ensure the diffuser is clean and completely dry. Store it in a cool, dry place away from direct sunlight.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or weak mist |
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| No power |
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| Water leakage |
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9. Specifications
| Brand | URPOWER |
| Model Name | OD-503 |
| Capacity | 500 Milliliters |
| Product Dimensions | 6.5"L x 6.5"W x 4.8"H |
| Item Weight | 1.2 Pounds |
| Material | Plastic |
| Power Source | Corded Electric |
| Wattage | 10 watts |
| Auto Shutoff | Yes |
| Light Source Type | LED |
10. Warranty and Support
URPOWER is committed to providing quality products and customer satisfaction. For any questions, concerns, or support needs regarding your URPOWER Essential Oil Diffuser, please contact our customer service team.
We offer 24-hour online support to assist you. Please refer to your purchase platform or the URPOWER official website for contact details.