Holmes HAP9726B-U True HEPA Allergen Remover Nullify Imported True HEPA filtration removes 99.97% of airborne allergens from the air that passes through the filter New LED Progress Bar to remind you when filter needs to be replaced Digital display with auto-off timer; 4 speed settings Recommended for medium sized rooms; Smoke CADR: 193 Recommended Filters: Holmes HAPF600D-U2 True HEPA Filter & Holmes HAPF60-U3 Carbon Filter