Coway Airmega 200M True HEPA Air Purifier with 361 sq. ft. Coverage in BlackWith a four-stage true HEPA filtration system featuring, this air purifier can help keep your air free of contaminants. The Coway air mega 200M includes filter change indicators, smart mode (that adapts the air purifier to its surroundings), energy-saving eco mode, and real-time air quality monitoring.4-Stage filtration system (Pre-filter, deodorization filter, true HEPA filter, vital ion) captures and reduces up to 99.97% of 0.3-micron particles in the air, including pollen, pollutants, and other allergens. It also reduces volatile organic compounds and reduces odor.Coway airmegas real-time air quality monitor keeps you informed of the quality of your air. In auto Mode, the fan and purification levels adjust to the space as needed.Fan speeds are available in 1, 2, and 3 stages by manually setting up. While auto mode automatically optimizes the speed setting 1 through 3 based on the level of indoor air quality.Filter replacement indicator checks both pre-filter and HEPA filters respectively to let users be aware of when to wash or replace the filter.