Perfect for cleaning mid-sized rooms up to 200 - 260 sq ft. 3 Stage filtration: Pre-fliter active carbon H13 True HEPA captures 99.97% of microscopic allergens. Captures 0.3 micron particles or larger including dust pollen smoke pet dander and bacteria. Automatic particle sensor adjust fan speed based on indoor air quality. 3 Fan speeds or auto mode. Sleep mode. Change filter indicator. 100V - 240V AC adapter.