Features: 1. DC motor. 2. Touch panel control. 3. 3 stages filter system: - PP filter to collect big dust particles and to prolong the lifetime of HEPA; - 99.97% efficient HEPA to filter the floating particles as small as 0.3 microns and pollen with little wind resistance; - Efficient activated carbon filter to eliminate the strange odor, to filter the methanal and TVOC. 4. Built-in ionizer to release negative ions; Concentration of negative ions:3x106ions/cm3. (Optional) 5. Adjustable speed in high, medium, low levels. 6. Quietly operates throughout the night, and has a gentle night light. 7. Night light can be switching on of off. 8. Filter changed indicator. 9. With UV function (Optio