Take charge and keep the air you breathe clean with the Coway Airmega 400s HEPA Air Purifier. By changing room air up to twice per hour, this HEPA air purifier removes 99.97 percent of pollutants from your home. With smart air purifier technology, you can monitor air quality in real-time, while simultaneously controlling your Airmega purifier on the Coway Airmega app or through your Amazon Alexa. With automatically adjusting settings, the Conway Airmega Purifier really does it all - it's a shame it can't cook dinner though.