Do what it is-but with little quirks

I bought recently is 2 fans of this type.
Did I wanted "a" fan of doing in a reasonable value for money what he should-namely Luftumwälzen without much noise.
That's why I came after a fumble on this model.
Need to configure the device while it itself, but is not a big challenge to the craftsmanship.
As mentioned I gekauft- the first was missing included the screw for stable securing of the protective screen, the 2nd unit initially worked the stage 1 of the device only if it was preceded on stage 2 2 devices.
Fortunately, that has given after 2 days (apparently only an initial contact weakness). Reference should be made to the low Geräuschentwicklung- you can leave the device (at level 1) even run at night in the bedroom .....
Who expects a Mercedes for the price definitely wrong-go but who just needs a quiet fan at a reasonable price makes no mistake .....