Blueair Classic 505 Air Purifier with HEPASilent Filtration for Allergen Reduction, Large Rooms 700 sq. ft. WiFi Enabled, ALEXA compatible True HEPA performance, enabled by HEPASilent Technology with particle filtration and electrostatic charge, captures 99.97% of airborne pollutants; allergens, mold, dust, pet dander, smoke particles and pollen Smart home unit, Wi Fi enabled with free Blueair Friend app. Compatible with Alexa / Echo Ozone Reducing - HEPASilent filtration air cleaner system, 3 fan speeds and whisper quiet operation for use in kids rooms, nurseries or offices SmokeStop filter with activated carbon for removal of odors caused by smoke, pets, food, and VOCs (sold separately) For medium to large rooms between 500 sq. ft. and 600 sq. ft., AHAM rated at 700 sq. ft.