With LCD screen With remote control function PP filter to collect big dust particles and to prolong lifetime of HEPA HEPA to filter floating particles and pollen with wind resistance Cold catalyst filter to decompose harmful gasses in air Effective under ambient temperature and requiring no illumination Activated carbon filters to eliminate strange order Built-in ionizer to release negative ions Concentration of negative ions: 3 x 106 ions/cm3 Adjustable speed in high, medium and low levels Timer setting Input voltage: 100 to 240V Frequency: 50 or 60Hz Power: less than 40W Noise level: less than 40dB