leise im betrieb und bringt eine gute kühlleistung

I've bought 10 of these. Nice vents for the price, just don't expect from them to make a shitstorm. Vent's point is silence, not enormous airspeed. It achieves its airflow over great area, so it doesn't need that great air speed.

Which is good for cases, since high airspeed carries dust etc.

But if you need it, you can certainly "oveclock" it. At 14V, its current useage was in my case close to that one rated for 12V (0.25A) and at 16V it used 50% more. But airflow was great.

I tried it up to 20V, but at that point electronics inside was audibly struggling. I wouldn't recommend running it over 16V for extended periods of time.

Not that you will need it. As said, even at 12V vent does move considerable volme of air.

LED's are a nice touch. I've bought these to use them in watercooling kit and I plan to use 8 of them sandwitched between two massive watercoolers and LEDs will be great addition, especially when driven by external microcontroller.

All in all, I've got very nice value for my money.

Alles super....!!!Sehr guter Lüfter.....
Das einzige was ich zu mäckeln habe, dass wenn man den Lüfter in der Seitenwand montieren möchte, sollte man auf gar keinen Fall ein Seitenfenster haben (starke vibrationen da der Lüfter etwas dicker ausfällt) und man sollte echt einen Top-Flow Kühler besitzen wie erwähnt, der Lüfter fällt etwas dicker aus.

Ansonsten In einem Meshgitter (Seitenteil) und im Gehäuse befestigt ein starker und leiser Lüfter!!