The LR 210 utilizes a high-efficiency 3-Layer EPA filter system with an additional integrated ionizer. This air purifier cleans the air and removes impurities from your environment. Features Air purification with a high efficiency 3 layer HEPA filter system with integrated ionizer. Cleans the air and removes impurities from your environment 3 layer filter: Prefilter, charcoal filter, HEPA filter removes 99.9% of airborne contaminants Timer function 3 speed levels Illuminated panel Night mode: ultraquiet operation with dimmed operating panel Ideal for battling allergies Best for medium size rooms