√. Voltage / Frequency / Power:  110-240V / 60Hz/50Hz / 40W                                             √. Airflow                  130(m3 / h)    √. Coverage Area:              90   m3                       √. noise:                       ≤ 55 (dB)√. purifying effect:           ≥ 90% √. 3-Speed Setting:           Low, Medium, High√. Four filter layer:Promotional filter/active carbon filter/Hepa/ion maker√. Unique design around entrance for wind can efficiently absorb the pulluted air in any corner.      √. Washable Antibacterial Filter will decompose the organic pollutants into carbon dioxide and water.  √. Negative Ionizer:  to generate millions of negative ion.             √. Activated carbon filter:absorb kinds of smoke and peculiar smell         √. Easy maintenance and low maintance cost as no traditional filters be adopted.