1st review for potential buyers to know.
The cheapest now (from around €8 low, up to €14 in most stores) CPU fan with LED.
With "locked" 3-pin low noise/rotation speed.
2,000 rpm, 24 dBA, 48 CFM, it claims up to 95w TDP, meaning for small processors in general, don't put it on powerful ones, although I believe no one would risk a noname CPU fan on a valuable processor, not even on mid-range ones.
Quite large in size for its price, maybe it fits in tall memory modules, for me with classic low-profile memory modules without heatsinks, it's okay.
It also provides a small package of initial thermal paste.

So, the package sounds good, too good to be true, what's the catch?
IT'S NOT RGB!
(That's why I wrote the cheapest with "LED", not the cheapest RGB).

The LEDs it has are its own and it calls them "RGB Lighting Effects" but it doesn't connect with an RGB cable to the motherboard.
They blink in a "random" pattern of its own (with a mix of circular areas, luckily it's not boring) by drawing power from the same classic fan connection (as I said, a 3-pin cable).

Anyway, for its price and size, it's a steal.
As for quality, I don't know, it will also depend on other buyers because I will rarely use it on the secondary PC where I installed it.
It doesn't have a manual, not even a fake leaflet or any paper, and there is no written information about the manufacturer's website and you won't easily find it as "roar" generally brings up articles about fans that make more noise than normal in searches.

I connected it to an AM4 slot where it fits somewhat difficultly at first but holds tightly. It locks into the classic notches that all AM4 slots have, it doesn't need anything else, not even a backplate, so it easily installs (the difficulty is in pressing until it locks into the notches and you're afraid of breaking something).
It also covers many other CPU slots, Intel LGA 1366/1156/1155/1151/1150, even the old 775, providing a plastic adapter base. However, I don't know how well it holds with plastic clips instead of screws there. For AMD, AM2/AM3/AM3+/AM4, 939/940.

In summary, it's value for money due to its size (an ordinary reputable one without "LED" would cost the same in this size, while the cheapest ones without "LED" are usually smaller) and the LED lighting is a bonus.
That's why I didn't return it despite the misleading RGB title.
These are taken into account considering the cost of around €8 because if we go to €16, there you can get the CoolerMaster 212 RGB which occasionally comes out at that price.

If you want to add a touch of disco to your PC, it's fun, for example in a PC for kids or in a smaller secondary PC where you don't want to spend money on proper RGB lighting. It also has a "catchy" appearance.
I wouldn't recommend it for demanding PCs due to unknown reliability, although that's unnecessary since in a good PC where someone would want to add color, they would choose a regular controllable RGB/ARGB CPU fan.