About this item For use in: Bedrooms, Corridors, Bathrooms, Living Rooms, Staircases, and Other Spaces/Rooms. Removes Bacteria & Viruses | Reduces Allergens | Relieves Congestion | Chemical Free | Helps reduce Asthma | Cleaner Air Eliminates Dust, Smog, Smoke, Allergens, Pet Dander, & Bacteria to help keep air Fresh & Clean | Smart design with LED indication Equipped with sterilization function | Low noise & low consumption | Up to 10 Million pcs/cm^3 of Negative Ion-Output Easy to Install - Simply Plug-In and NO Maintenance Needed (No filters or Upkeep) | LED Brightness 10-20 Lux