... which is made of fiberglass, can filtrate small particle with the size less than 0.0001mm, such as dust ... control, four-lay filter and over oxygen device, with high level, mid-level and low level wind, timing ... set 1hour,2hour,4hour and 8hour, Four-lay filter with triple purify effect. The surface color can be customized ... Area: 80m2Timing: 1H 2H 4H 8H multifunction air cleaner with ozone generator