Materials, plastic with marks on the material used, and conformity with the standards are all advantages that this product possesses. It can be seen that it drives the impeller, and there is vibration when the fan is turned on; however, thanks to the rubber mount of the rotor, this does not have a significant impact on the noise level or the beating of the fan itself. The fan is lovely, and it operates with very little noise. Despite the fact that one of the two that were purchased is not properly centered, it works very quietly. I recently installed it but haven't used it for quite some time. Cons: I ended up buying two of these. mounting and rotor technology makes it possible to attenuate negative vibrations, even in a case that is "slightly" fixed. this means that the beating of the fan impeller may be heard in one of the cases, but its significance is not significant.