... and then through devices in order of pre filter, static adsorption, three-in-one filter (active carton filter, LBC system & ozone), ultraviolet tube, ... the air indoor.Static air purifierHigh and new technology& High CADRExcellent effect of removing formaldehyde, benzene, ammonia, and killing virus and ... but 40% evnery saving than ordinary UV lights. 2012 new high efficiency and quality air filter