The Stadler Form Roger Little air purifier provides effective air purification in spaces up to 570 sq. ft. in size. The Roger Little uses a specially-designed Dual Filter™ with HEPA and activated carbon to clean the air of harmful and unwanted contaminants. The HEPA filter removes fine dust, pollen, viruses and bacteria from the air and the activated carbon eliminates bad odors, VOCs, formaldehyde, tobacco smoke and more from the air, leaving your home clean. The Roger Little has internal sensors that continuously monitor the air quality in your space to let you know whenthere is a contamination. The air-quality indicator on the front of the Roger Little changes color to provide a quick visual of the air quality in your space. For simple operation, the Roger Little has an auto mode that automatically adjusts the cleaning performance depending on the level of contamination in the room. The Stadler Form Roger Little air purifier will maintain clean and healthy air in your home, making it great for those suffering from allergies, plus it is backed by a manufacturer's 1-year warranty.