Stinks like hell and has too little power!

The thing looks in principle like in the picture. It stinks like hell that I would not have thought. Other products of this type should also do that I have read in similar products. Otherwise, it just has the size ensprechend little power. I wanted to remove actually stuck dust adhesion in PC Inneneren who clamped in the fan or the fan of the graphics card. For the bellows but unfortunately not enough. Even on my keyboard he could only partially remove the dust. In the interstices he does have some whirled but the firm adhesions which have been there for months (years) just do not get stuck. A bit disappointing. That's why only 2 stars!