DESC: With the HAMILTON BEACH 04381 Three Speed Allergen Reducer doing its silent magic somewhere in the room, you won't have to sneeze and sniffle away an otherwise lovely spring or summer day! This potent allergen reducer covers up to 210 square feet. Features advanced 3M Filtrete allergen reduction filter Effective at capturing dust, dust mites, debris, mold spores, pollen, smoke and pet dander Three selectable speeds Filter lasts up to 120 days