HEAVENFRESH XJ-2100UV Safe and effective: The unit produces 60 Millions ions per cm and removes pollutants as small as 0.01 microns. Advanced air-cleaning capacity: The electrostatically-charged dust-collection plates magnetically trap pollutants. Germicidal UV Light: Destroys micro-organisms such as germs, viruses and bacteria and helps create a healthier environment. Independently controlled booster fan: Turned on during the day to increase distribution of ions and to turn off at night for silent operation. Coverage area: The unit covers up to 46 m (500 ft)