High Concentration Ionic Air Purifier. Supply Healthy Negative Ions to Rooms. Breathe Healthy Air All Day. Compact, Electric Plug-In. Plugs Directly into Wall Electric Outlet; Constant Ionization or 30-Min: Produces 10x106ions/cm3 Generates Healthy Negative Ions for Humans & Pets for Happy Emotions & Healthier Lifestyle Removes Common Dust and also Living Organisms from Air such as Bacteria, Odors, Allergens, and Pollutants for Better Breathing New Technology Cleans the Air WITHOUT Metal Strips or Needles which become Damaged over Time No Filter to Clean or Change; Spray Air into Vents or Suck out Dust from Vents with Vacuum Air as Needed