Air Multiplier technology delivers over 290 litres per second of smooth, yet powerful airflow - 350 degree oscillation circulates purified air throughout the whole room. Auto mode. Constantly monitors your air quality, automatically adjusting airflow. Scientifically proven to reduce pollen and allergens in the room. Creating a cleaner, healthier home. Night mode:50% quieter for lighter sleeps. Fully sealed to HEPA standard. Control and monitor air quality from anywhere using the MyDyson app. And control it hands-free with Alexa, Siri and Google Home.