Vivitar Home 2-in-1 Quiet Room Air Purifier and Ionizer, 27 inches Provides Multiple Levels Of Air Purification Keeps Air Clean Whisper-quiet Mode Uses Negative Ions To Trap Pollution & Contaminants While Releasing Clean, Healthy Air Turbo Mode Eliminates Strong Odors Quickly Using The Built-in Fan To Increase Air Circulation Simple To Maintain