High grade integrated filter removes harmful ultrafine particles as small as 0.003um, 800 times smaller than PM2.5 Remove 99. 97% of airborne ultrafine particles, dust, allergens, gases, bacteria and viruses Intelligent purification – its professional grade air quality sensor automatically monitors, reacts & purifiers air so you don’t have to lift a finger. Night mode and automatic ambient light control ensures it doesn’t disrupt whilst you sleep. Quiet mark certified 360-degree airflow circulation enables fast and efficient purification in medium sized spaces up to 85m2 - Purify the air in a room of 20m2 in just 9 minutes Control and monitor the 2000i from anywhere using your air matters app. Use with Alexa for voice control