The Dyson Pure Cool™ DP04 is a powerful but compact purifying desk fan that clean an entire room properly. Designed for real home conditions, this purifying fan senses the air quality automatically to capture ultrafine pollutants, and uses Air Multiplier™ technology to deliver smooth, yet powerful airflow throughout the whole room.The three intelligent sensors automatically senses and reports air quality levels on the LCD display, including ultrafine particles, allergens, volatile organic compounds, and Nitrogen Dioxide. The sealed 360º HEPA filter captures 99.97% of allergens as small as 0.3 microns, making this an ideal air purifier for allergies, pets, dust, pollen, and mold spores. Additionally, the activated carbon filter removes pollutants and household odors to keep air fresh. Best of all, this home air purifier and fan is wi-fi-connected and Alexa enabled. Use Alexa voice control to turn it on/off and access updates on the air quality, or switch over to the Dyson Link app to review real time reports, remotely control your machine, and even create automatic schedules around your day.