... anywhere;3)Eliminating dust and static,purify pollutants such as carbon monoxide,ox nitride,ox hydroxide,eliminate various germs powerfully by ... rate above 99.5%;4)The filter is decomposed into carbon dioxide,no secondary pollution;5)Sleep timer function,the use of ... one filter: washable pre-filter with an active layer of carbon and our signature filtration. Four speed settings. Twelve hour timer ...