... which is made of fiberglass, can filtrate small particle with the size less than 0.0001mm, such as dust ... computer 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 ... : 50WOzone output: 500mg/hEffective Area: 80m2Timing: 1H , 2H , 4H , 8H