... is 98%,and can make the air fresh Air purifier-KJF-400 main Feature:Sensor of air cleaning monitor will change the speed ... automatically according to the air quality.Multiple filtration: prefilter, activated carbon, HEPA.TiO2 photocatalyst filters is can continually ... use and time setting.We have standard technology:pre-filter,HEPA,activated carbon,2*UV lamp,2*TIO2 photocatalyst,negetive ...