Fantastic and cheap. 28 - 35 euros is good. The whole device lights up from the LED and it lights up beautifully. Blue, purple, green, yellow, red, orange, pink, and all the changes happen slowly and gradually, seeing all the shades change harmoniously.
Good water quantity of 300ml and it lasts for hours. It has 2 function buttons. One is on/off with the option of LED mode, freezing in a chosen color, and functioning without LED. The second button is a timer: one press (2 hours), second press (4 hours), or continuous operation.
The steam comes out with satisfactory thickness, reaching a height of 35cm in total. At 15cm it is completely vertical and in the other 15cm it is managed and spread beautifully downwards.
I don't think I would buy anything better.

Colorful and beautiful at night, it works non-stop at home, almost 24 hours with two fillings. A bit expensive compared to the material, but very effective and durable compared to other cheaper ones that I have bought in the past and thrown away after a short time.

It does what it says... it diffuses into the atmosphere whatever essential oil you put in the water, it lasts for many hours, if you want you can change colors or just leave it in one color.
Negative is the price for the fake plastic material. You can find a similar one much cheaper on some other site.