HUNTER AIR PURIFIER. Model HT1726. Has 3 speeds. The Bamboo-Charcoal HEPA+ filter designed to capture up to 99.97% of airborne allergens and contaminants as small as 0.3 microns in size, including allergens, mold, pollen, smoke, dander and dust, to improve indoor air quality ViRo-Silver carbon pre-filter designed to rid the air of larger particles and odors for refreshingly breathable air Easily accessible, manual three-speed control High speed maximizes air filtration performance Quiet operation on the low-speed setting Built-in filter change reminders 2-, 4- and 8-hour timer settings Circulates room air five times every hour Built-in handle for easy portability