With a 4-stage air purification system, this unit removes 99.99% of airborne particles as small as 0.003 microns in size. Winix PlasmaWave® technology can help reduce the presence of bacteria and viruses in the air. The unit's built-in Smart Sensors detect and monitor air quality in your environment and provide a visual representation of current air quality. When in auto mode, the unit automatically adjusts fan speeds to ensure efficient and cost-effective cleaning. Sleep mode automatically activates when the room is dark, providing quiet and energy efficient operation. The WiFi feature allows you to connect your air purifier to the Winix Smart app and monitor the air quality in your home, control your air purifier, and track the life of the filter.