Breathe freely knowing the air around you is clean with the Coway Might Air Purifier. Equipped with true HEPA and eco modes, this compact yet powerful device works tirelessly to freshen the air of your home or office as quickly as possible. Coming in your choice of black or white, the sleek Mighty Air Purifier utilizes four stages of filtration to remove harmful pollutants and odors from the air in just 30 minutes. This purifier is smart, too. As the air gets cleaner and passes through the device, the air quality indicator can determine when the air has been effectively cleaned. If pollutants are not detected for 30 minutes, it automatically switches the fan off to conserve energy. The Mighty Air Purifier also has a filter change indicator although the carbon filter will last you up to six months and the HEPA filter an entire year.