"So the case comes with two 80 mm fans in the back, less surprisingly made by Zalman.
They are insulated with soft gel mounts to prevent vibrations travelling to the case
frame. With the delivered adapter the voltage of the fans can be changed between 12 and 5
volts. There are also fan guards at the back so no foreign objects, fingers etc. can be
pushed to the fans from the behind of the case."
FULL STORY @ METKU (http://www.metku.net/index.html?path=reviews/hd160/index_eng)