Airborne particles such as dust, pollen, smoke, and dander, typically positively charged, are collected within this air purifier and removed from your environment. The electrostatic cleaning system simply traps airborne matter in the revolutionary electret filter system. Eliminates up to 99% of pollen, animal hair and dander, smoke particles, dust and dust mites. Compact and attractively designed, the Bionaire Ionizer fits well in the bedroom, office and other places where clean air, style and quiet operation are important.