I have previously read it in the other reviews, some have also weakened and I also thought to myself, "Well, logically, a small turbine makes up a sound" ... but now after the installation and testing, I can say very clearly: is not at all !! At normal water pressure of the shower head is already incredibly loud. And it's not a pretty sound, but really annoying. Well, 9.99 can cope, I buy stop but a Grohe shower head - but who has no LEDs ;-) PS: but it is working properly - therefore still 2 stars. Can only use / want him to not ... PPS: Correction: after only a few uses apparently no longer works the Temeratursensor correctly. It appears already red at even lukewarm water and warm it flashes already. So: Really, really really SCRAP the part! Rating corrected to a star!
