

WP-021 500ML Popular Onion Essential Oil Aroma Diffuser
- ●Capacity: 500ml
- ●Mist Output: 30-45ml/h
- ●Timer Setting: 1H / 3H / 6H / NO
- ●Light: 7 Colorful Lights, Fixed Color
- ●Operation Mode: Touch / Remote Control
- ●Power: 12W, 6W
- ●Voltage: 24V, 5V
- ●Material: PP+ABS
- ●Auto Shut-Off: Yes, without water
Description of WP-021 500ML Popular Onion Essential Oil Aroma Diffuser
The WP-021 is a 500ml ultrasonic aroma diffuser in a popular onion silhouette with a wood grain finish. It works as several products at once - aromatherapy diffuser, cool mist humidifier, air purifier and ambient light - and the seven-colour LED ring around the base is soft enough to leave on all night without dazzling your eyes. Two mist levels let you choose a gentle weak mist for overnight use, or a strong mist when the fragrance needs to fill a large room quickly.
The timer can be set to 1 hour, 3 hours, 6 hours or continuous, so one 500ml fill carries you through the night without refilling; the unit stops automatically when the time is up or the water runs out, protecting against dry burning. Everything is controlled from the LIGHT and MIST buttons on the base or with the included remote control. Power is listed at 12W and 6W, the ultrasonic frequency is 2.4MHz and noise stays below 36dB, so it is quiet enough for a bedroom or a baby room. The 1.5-meter cord plus a US, UK, AU or EU plug adapter suits any market, and wholesale and OEM/ODM service is available on this model.







500ml Large Water Tank
Features 500ml water capacity, this scent diffuser works very well to cover large spaces to add moisture and fragrance to the air. When adding water, DO NOT exceed the Max water line when filling water, otherwise, it may result in no or low mist.

Misting Modes
The diffuser also has both strong and weak misting options in addition to an automatic shut-off feature, set it to weak mist mode for all night’s aromatherapy enjoyment, but without worry about overheating or dry burning when falling asleep.
Key Features of WP-021
This ultrasonic essential oil diffuser is an incredible multifunctional aromatherapy device unlike any other. It features a large, easy-to-clean 500ml water tank, multiple mist nebulizer modes, and a remote control for added peace of mind and safety. Essential oil diffusers are equipped with a waterless auto-shutoff feature.
Using microporous atomization technology, it melts water molecules into a nanoscale cool mist to quickly release fragrance and fill everything, even a large room. Add a few drops of your favorite essential oils to create an aromatic spa at home. Helps the air better hydrate your skin.
This aroma diffuser comes with 4 timer settings (Continuous Mode/1H/3H/6H) and 2 mist levels (Strong/Weak) for you to choose from, when time is up or the water runs out it will automatically stop working, no worry about overheating.
Having a high volume of 500ml large water tank, the diffuser frees you to add water frequently, and works well in any large space, easily providing whole night’s humidification and oil aromas. With low noise design, it will run without disturbing sounds, ensuring a quiet environment.
Oil diffuser also features an independent LED light option to further elevate your mood. The thin light ring around the base is soothing and soft, which won’t dazzle your eyes when sleeping at night, but perfectly livens up your space.
Made from high-quality PP and ABS material, the essential oil diffuser produces safe mist and it’s cool to touch, all your family can rest assured to use. The large base also makes it easy to clean without a huge hassle.
WP-021 Technical Data
| Performance | Detail |
|---|---|
| Material | PP+ABS |
| Shell Craft | Water Transfer Printing |
| Light | 7 Colorful Lights, Fixed Color |
| Operation Mode | Touch / Remote Control |
| Noise | <36dB |
| Timer Setting | 1H / 3H / 6H / NO |
| Function | Automatic power off without water |
| Ultrasonic Frequency | 2.4MHz |
| Voltage | 24V, 5V |
| Wire Length | 1.5 meters |
| Power | 12W, 6W |
| Mist Output | 30-45ml/h |
| Capacity | 500ml |
| Package Includes | Aroma diffuser ×1 / Adapter (US, UK, AU, EU) ×1 / User manual ×1 |
Applications of WP-021
Bedrooms
Quiet (<36dB) for undisturbed sleep, with soft RGB lights and aromatherapy to unwind after a day.
Baby Rooms
Gentle moisture protects babies’ skin, and low noise won’t startle little ones.
Living Rooms
Stylish design doubles as decor. Maintains a comfortable humidity level, masks odors (e.g., cooking, pet smells) with pleasant scents, and the right aroma boosts mood for conversations or relaxation.
Offices
Reduces dry air from AC, and mild aromatherapy eases work stress without distracting others.
Yoga Studios
Calming scents (with essential oils) and soft lights boost relaxation during practice.
How to Use & Care
Instructions
- 1
Remove the top lid, fill the tank with water up to the max line, add 3-4 drops of essential oil, then replace the lid and plug the diffuser in.
- 2
Press the MIST button once to start the mist, and press it repeatedly to step through the timer options - 1 hour, 3 hours, 6 hours or continuous mode.
- 3
Press the LIGHT button to switch the LED ring on; press it again to fix a colour, and hold it for 2 seconds to turn the light off.
- 4
Use the remote control for the same functions from across the room - on/off, intermittent or continuous mist, timing, mist strength and light.
- 5
Set the mist to weak mode for all-night aromatherapy, or strong mode when you want the fragrance to fill a large room quickly.
- 6
Relax and unwind - the diffuser stops automatically when the water runs out, so it is safe to leave running while you sleep.
Tips
- Use only with 100% essential oil or water-based fragrances. Acidic oils can affect the longevity and performance of the diffuser.
- To prevent damage, use room temperature distilled or filtered water. Stop use and refill when the water runs out (it auto shuts off, but avoid dry operation).
- Clean the tank regularly (the rounded design reduces dirt buildup, making cleaning easy).
- Ensure the device is placed on a flat surface.
- Avoid diffusing strong oils around those with asthma, allergies, or respiratory conditions without consulting a healthcare provider.
OEM&ODM Service
ODM Service
- Choose from proven hot-selling WINPRO designs
- Add your logo and branding (package, sticker, logo)
- Select from existing colours and plug types
- Custom packaging artwork (colour box / carton)
- No mould or tooling costs
- 24-hour after-sales response
OEM Service
- Custom product structure development
- New mould development for custom design
- PCB and function customization
- Material and component customization
- Technical specification planning
- You own the design IP
OEM vs ODM: Which is Right for You?
| Feature | ODM (Quick Branding) | OEM (Custom Development) |
|---|---|---|
| Design Ownership | Factory owns design (existing WINPRO models) | Client owns design |
| Minimum Order Quantity | 3000 pcs | 1000 pcs |
| Lead Time | 30-45 days | 15-35 days |
| Development Cost | Usually no tooling cost | Tooling / mould cost subject to design |
| Sample Time | On request | On request |
| Customization Scope | Logo, sticker, colour box, carton, plug type | Structure, mould, material, PCB, functions |
| Best For | Startups, testing the market, quick launch | Established brands, long-term strategy |
ODM Process: Launch Your Brand in 7 Steps
Factory & Certification

WINPRO Company Building & Factory
WINPRO's factory covers an area of over 6,000 square meters, boasting multiple production lines and strong R&D capabilities. ISO9001 certified, with most products holding CE/FCC/RoHS certifications. Factory-direct pricing with one-stop OEM & ODM service.
- ●100+ Professional Certificates
- ●20+ Excellent Designers
- ●Strict Quality Inspection
- ●Factory with an area of 6000m²
- ●Serving over 1000 companies
Why Choose WINPRO

FAQ
What is the water tank capacity of the aroma diffuser?
The water tank capacity is 500ML.
What is the mist output rate of this diffuser?
It has a mist output rate of 30-45ML/H.
How noisy is the aroma diffuser during operation?
It operates at less than 36dB, ensuring an ultra-quiet experience.
What timer settings does this diffuser offer?
It offers four timer settings - continuous mode, 1 hour, 3 hours and 6 hours - and it stops automatically when the time is up.
Does the aroma diffuser have an auto-off function?
Yes, it features a waterless auto-off function for safety.
What is included with the aroma diffuser?
The package includes the diffuser unit, an adapter (US, UK, AU or EU plug) and a 1.5-meter power cable, plus a user manual.
Does the aroma diffuser have LED light features?
Yes, it comes with a 7-color LED light ring that can cycle automatically or be set to a fixed color.
Get a Free Quote
For wholesale pricing, samples and OEM customization, send us an inquiry - we reply within 24 hours.
