120mm SmartCool Up to 80% quieter Thermally controlled 120mm case fan.

Features:

* Built-in temperature sensor
* Variable speed: RPM increases as the temperature rises
* Double ball bearing design for extended life
* Comes with a 4-pin power connector and a separate signal connector to motherboard
* Package Dimensions: 1.6"(L) x 7.2"(W) x 8.7"(H)
4.06cm(L) x 18.29cm(W) x 22.10cm(H)
* Package Weight: 0.5 lbs/0.23 kgs