The simple, compact and easy to maintain Coway Airmega 150 Air Purifier features three-stage filtration with a washable pre-filter, charcoal deodorization filter and Green True HEPA filter which captures and reduces 99.97% of pollen, pollutants and VOCs. Includes an air-quality indicator for real-time monitoring. Features of the Coway Airmega 150 Air Purifier include: Powerful 3-stage filtration. The dynamic combination of a pre-filter, deodorization filter, and Green True HEPA Filter effectively reduces airborne odors and pollutants. Easy-to-remove washable pre-filter: Just slide it out, rinse and hang to dry. Should be cleaned every two weeks. Filter-change indicators. Automatic speed control based on particles in the air around it. Intuitive air quality indicator with on/off light. Maintains pure air in spaces up to 214 square feet. Powered by standard plug-in (included). Includes two odor filters and one HEPA filter. Made of white plastic and metal. Measures 18.5h x 13.5w x 6.5"d.