[Coverage] Optimized to clean spaces up to 405 sq. ft. in 30 minutes or up to 810 sq. ft. in 60 minutes. [True HEPA Filtration System] Combination of a pre-filter, deodorization filter, and True HEPA Filter reduces 99.999% of 0.01-micron particles, including pollen and other allergens. It also reduces 99% of volatile organic compounds and odor. [Auto Mode] Constantly monitoring the air quality, the fan automatically adjustes to most effectively purifiy your space as needed providing a new level of clean in real time. [Sleep Mode] AQI and touch button lights are turned off and the fan runs at the lowest speed to ensure good nights sleep [3-Stage Manual Fan Speed] Control your Airmega 100s fan manually with low, medium and high settings. [Air Quality Indicator] Pollution sensor communicates indoor air quality in real-time. Brightly colored LED lets you know how clean or dirty your indoor air is every minute of the day. You can turn off the light for sleeping.