Yescom New Living 6-Stage Air Purifier Cleaner Hepa Ionic Ozone UV Generator Air Filter 6 stages of purification: negative ionization, dual ozone plates, UV light, photo-catalytic filter, HEPA filter, activated carbon filtration Washable filters and purification plate Variable speed motor to control the O3, ionization& UV fan speech High-end acrylic case design, neat and attractive appearance Plate receiver slot allows insertion and removal of ceramic plates for cleaning