- 4Pcs USB Humidifieration Atomization Disc Micro Interface Atomization Drive Circuit Board DC 5V for DIY Home

I used mine for air freshener oils.

All 4 of the ones I got work, however 2 of them have a significantly lower output than the other two. For the price it's hard to beat, and the output is perfect for raising humidity in small areas, e.g. plant shelves.

Have 2 running currently and they produce more than enough humidity for my small closet nursury. Features I would change if I could. The piezo wire is too short, since the card must be kept dry it would be nice if it were longer to get the electronics away from the humidity. I would also provide another alternative option where there is no button, and no auto shutoff, and have it directly controlled by incoming power so that one can use a smart hygrometer controller.

Very nice kit easy to work with and will buy again.

I selected this supplier from hundreds of other options after spending a significant amount of time of scrutinizing reviews of hundreds of other options. My observation is these ones perform top notch for the spend after rigorous testing. Be advised the transducer will burn through 8 ounces of water in a few hours. My use for these is to build aromatherapy device to atomize organic essential oils into the air. One that will not crap out in a few weeks or months, nor burn your house down.

These work really great and have a low profile which is perfect for sneaking into terrain. They put off a decent amount of vapor and it looks great! My only complaint is the instructions were very unclear. Like which side of the disk to have pointed down or up so it takes a little trial and error. Incase you're wondering the ALL METAL side goes down touching the water, the side that has a small white disk in it points up. These are an excellent value and have a wide range of uses.

One works flawlessly thoughbthese seem to be very delicate, i hsve only recieved three units in my psvcked dupposed to get 4 and one ofthe three arrived cracked in half down the middle... It actually barely works (idk how its possible) but not well enough to be viable for any utility. As for the other two one works great i have yet to test the third. Im frustrated with this outcome they should be sold with extra transducer disc things and half the pcbs ( most people dont have four projects which all utilize the ultrasonic effect and the boards will probably last forever

I’m using these as individual plant humidifiers in containers of water. The first batch had 2 with broken wires at the soldered points. Our soldering iron stopped working last year and we’ve had no reason to replace it so couldn’t fix on our own. Customer service was very helpful and sent out another set to be delivered the next morning! Thankfully these worked well and all the plants are happy to have the extra humidity. These were a good deal overall and should serve the plants well during the dry winter this year and possibly next as well.