NZXT Sentry LX Fan Controller Review
 

Compared to its predecessor the Sentry 1, the LX can control three more fans and gather two more temperature readings. It's a good thing, because nowadays, cases tend to have more and more fans. The fact that it occupies two drive bays instead of one allows for a bigger screen to display all of the information at the same time. So you don't need to push any buttons to see the information you want, something that you needed to do with the Sentry 1.

http://www.overclockersclub.com/reviews/nzxt_sentry_lx/