The Cougar 120mm Voltex Fan provides un paralleled airflow for a low price. A multipurpose fan, you can use these as case fans or CPU cooling fans. In contrast to loud and buzzy fans that populate the market, these are dead silent at low RPMs and only make relatively small noise at higher RPMs, like a light breeze. These are simple to mount on PCs and provide cooling to all your components. Not only that buy it also looks great in any system.