Air often carries fine dust, pollen, and unpleasant odors as well as viruses and bacteria. But VIKTOR filters all this through a specially developed HPP Filter System (International patent application pending). Small and powerful, this unit has top CADR values (Clean Air Delivery Rate). The special filter cleanses the air while active carbon eliminates unpleasant odors. Five capacity stages (extremely quiet to powerful) and dimmer night-mode LED control lights.