EC Buying AK-204 USB Dual Spray Humidifier: Is This DIY Ultrasonic Module Worth It in 2026?
The EC Buying AK-204 is a $8.09 DIY atomization circuit board, not a ready-to-use humidifier. Buy it only for electronics projects, plant misting, or fog effects.
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Best For
How this humidifier scores for different use cases
USB-powered and extremely compact, but it is a raw component requiring DIY assembly. Not a plug-and-play desktop humidifier.
Weighs only 0.02 kg and runs on USB 5V power, making it extremely lightweight. However, it requires a separate water container and DIY setup to function.
This is a bare circuit board module, not a ready-to-use humidifier. It has no tank, no housing, and no runtime capability for overnight bedroom use.
Completely unsuitable for nursery use. It is an exposed electronic component with no safety housing, no BPA-free certification, and no child-safe design.
This tiny atomization module produces minimal mist output and has zero coverage area capability. It cannot humidify any meaningful space on its own.
No WiFi, no app control, no voice assistant support. This is a basic circuit board with no smart features whatsoever.
Our Verdict
This is not a humidifier. It is a tiny circuit board for building your own humidifier. You need electronics skills and a DIY mindset to use it.
The EC Buying AK-204 gives you a dual-spray ultrasonic atomization module. It measures just 33.9 x 22.6 x 17mm. That is smaller than a postage stamp.
You plug it into any USB port for 5V power. It draws only 2-3 watts. The dual nozzles produce fine mist at 108-110 KHz ultrasonic frequency.
For $8.09, you get the core atomization hardware. You still need a water container, wiring, and an enclosure. Think of it as one ingredient, not the whole meal.
This module works best for science projects, plant misting setups, or landscape fog effects. The manufacturer lists DIY, plant moisturizing, and landscape atomization as intended uses.
If you want a ready-to-use bedroom humidifier, skip this product entirely. Look for a complete unit with a tank, controls, and housing instead.
What We Like
- Costs only $8.09, one of the cheapest atomization modules available
- Weighs just 0.02 kg, lighter than a single AA battery
- Runs on USB 5V power, so any phone charger or power bank works
- Dual spray nozzles create more mist than single-spray modules
- Auto shut-off feature protects the circuit board when water runs out
What Could Be Better
- No water tank included. You must build your own container
- No variable mist control to adjust spray output
- No timer, night light, or aromatherapy features
- No housing or enclosure. The exposed circuit board needs a DIY case
- No humidity display or humidistat to monitor room moisture levels
Standout Features
Full Specifications
Energy & Power
| Wattage | 2.5 |
Physical & Dimensions
| Weight | 0.02 |
| Width | 1.34 |
| Depth | 0.89 |
| Height | 0.01 |
Features
Included Features
Not Included
Frequently Asked Questions
Common questions aboutAtomization Module Double Spray USB Humidifier Dual Spray Driving Circuit Board Atomization Experimental Equipment Ultrasonic DIY
Is this a complete humidifier ready to use out of the box?
No. This is a bare circuit board atomization module. You need to supply your own water container, enclosure, and possibly additional wiring to build a working humidifier.
What power source does this atomization module need?
It runs on DC 5V USB power and draws 300mA at 2-3 watts. Any standard USB port, phone charger, or portable power bank can power it.
How big is the atomization module?
The module measures 33.9 x 22.6 x 17mm, roughly the size of a large coin. It weighs just 0.02 kg.
What is this module best used for?
The manufacturer recommends it for DIY projects, plant moisturizing systems, and landscape atomization or fog effects. It is not designed as a standalone room humidifier.
Does it have an auto shut-off feature?
Yes. The module includes auto shut-off, which protects the ultrasonic transducer from damage when water runs out. This is important because running dry can burn out the atomizer.
Best For
How this humidifier scores for different use cases
USB-powered and extremely compact, but it is a raw component requiring DIY assembly. Not a plug-and-play desktop humidifier.
Weighs only 0.02 kg and runs on USB 5V power, making it extremely lightweight. However, it requires a separate water container and DIY setup to function.
This is a bare circuit board module, not a ready-to-use humidifier. It has no tank, no housing, and no runtime capability for overnight bedroom use.
Completely unsuitable for nursery use. It is an exposed electronic component with no safety housing, no BPA-free certification, and no child-safe design.
This tiny atomization module produces minimal mist output and has zero coverage area capability. It cannot humidify any meaningful space on its own.
No WiFi, no app control, no voice assistant support. This is a basic circuit board with no smart features whatsoever.
Scores
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