Sensor of air cleaning monitor will change the speed automatically according to the air quality. Multiple filtration: prefilter, activated carbon, HEPA. TiO2 photocatalyst filters. UV lamp for sterilization and disinfecting. Negative ion generator refreshes indoors air. Mobile in use and time setting.Parameter Voltage AC100-240 V Frequency 60/50Hz Power 80w Weight 12kg Air delivery 400(H),300(M),200(L)m3/h Noise 50 dB Dust purifying rate 99% Formaldehyde purifying rate 98 % Benz purifying rate 99.8% UV sterilization rate 99%