Secura 5-in-1 HEPA Air Purifier Cleaner, CADR 218 m&sup3;/ Hour Home Air Quality Monitor, Allergen Eliminator Air Cleaner for Large Rooms, Home, Eliminates 99.97% of Dust & Pollen, Smoke and Pet Dander 5-in-1 Composite Filtration System: (Pre-filter, True HEPA Filter, Activated carbon filter, cold catalyst filter, negative ion generator) removes 99.97% of hair, dust, pollen, smoke, odor, mold spores, and pet dander; filters air pollution of pm 2.5 and formaldehyde, beneze,tovc. Negative Ion generator releases negative ions into the air, eliminating airborne bacteria and contaminants. Refreshes air quality. Three fan speeds. Auto-on and auto-off timers enable the air purifier to automatically switch-on or off after 1, 2, or 4 hours. Convenient sleep mode promotes peaceful, undisturbed sleep throughout the night. CADR:200 m/hour, effective area up to 40 /430 ft, Perfect size and elegant design make it a perfect fit at home or office. Eco-friendly with features designed to save energy and provide quality assurance. Uses only 40 watts of power. That is about 1kWh per week(based on 4 hours operation per day).