... is made of fiberglass, can filtrate small particle with the size less than 0. 0001mm, such ... output; with the high air current design of purify machine. Micro computer control, four-lay filter and ... over oxygen device, with high level, mid-level and low ... 1hour, 2hour, 4hour and 8hour, Four-lay filter with triple purify effect, remote control.The surface color ...