Automatically senses,captures and traps pollutants for cleaner air, Detects and destroys formaldehyde , Purifies the whole room,Cools you when needed,Projects over 77 gallons of air a second for cooling airflow. Backward airflow mode. Diverts airflow through the back of the machine. To purify, without cooling you. engineered to reduce turbulence, so it's 20% quieter than the previous model.HEPA Filtration,Intelligent Sensing: Automatically senses and reports air quality levels in real-time.​Sound level: 61.5 dB, Max. Airflow: 290 l/s,Speed levels: 10, 81m3