Oreck Optimax HEPA Air Purifier for Small Rooms AIR94 HEPA-Type filter captures 99% of dust, allergens, smoke, pet dander and pollen at 1 micron from the air that passes through its filter Odor filter reduces common household odors and VOCs from the air that passes through its filter OptiMax has a CADR rating of 100 for use in rooms up to 155 SF 3 speeds, Air Revitalizer, 2, 4, or 8 hour Timer, Change filter indicator lights 3 Year Limited Warranty