Knobs is very well served - there are also fan controllers with touch-screen operation, am I a) later it encountered and b) I could have gained in any case the knob version. As mentioned in other reviews some Drehknöppe are stiff with me, but who has not just potato chips-greasy finger gets the already regulated :-) I ask one thing, however, to bear in mind: So beautiful and good fan controllers are generally so must also the fan to fit. It brings SAY NOTHING WHEN FANS runtergeregelt ARE AND THUS jolting AND GRINDING noises GIVE - LIKE MY motley fan There MIR CLARIFIES HAVE. I have therefore brought me matching Scythe Kaze-fan, unfortunately the run from scratch softly and very slowly (800 u / min) ... In retrospect, bring me the fan control very little. The front now looks cool, the fan would be but either way quietly. Will the meaning of a fan control not entirely deny, but with quiet fans need - up to the coolness factor - not.