New Automatic Self-cleaning Filter System achieved by two triple structure filter units composed of Powder filter, Damper and Prefilter. Approved for Dust Classes M in accordance with the EU standard. For wet and dry vacuum cleaning. Stainless steel tank. Flat top design allows double stacked for stable and space saving storage. Caster stopper prevents the cleaner from moving unintentionally. Large bumper protects walls and furniture from bumps and scratches. Air flow sensor beeps when air flow is reduced by clogged filter, full tank etc. 5.0m power cord