GermGuardian AC4020 3-in-1 Portable Air Purifier with High Performance Allergen Filter and UV Sanitizer, for Allergen, Mold, Dust and Odor Reduction, Germ Guardian Home Air Purifier High Performance Allergen Filter reduces dust and allergens down to .3 microns such as household dust, pet dander and pollen Air Purifiers with Charcoal filters reduce common odors from pets, smoking and cooking UV light technology works with Titanium Dioxide to kill airborne bacteria, viruses, germs and mold spores. 9 inch 3 speed mini tower is perfect for any room and fits great in small spaces IMPORTANT: Use GENUINE Guardian Technologies replacement parts to maintain product performance. Only one single filter needs to be replaced every 6-8 months depending on the use of the product; Replacement filter is filter A - Model FLT4010 (ASIN B003AKNK4A). Voltage: 120V 60Hz