Captures smoke, dust, pollen, PM2.5, virus, bacteria and mold Filter replacement indicator Convenient filter access for easy replacement On & OFF timers: 1 to 8 hours Casters for portability Remote control ETL ARB certified (this air cleaner complies with the federal ozone emissions limit) 4 fan speeds (Low, Medium, High and Turbo) Tested by Intertek. 99.9% reduction of Escherichia coli, Staphylococcus epidermidis and Aspergillus niger. Test period: 15-30 minutes.