High-Efficiency: Covers a room size up to 450 sq.ft. in one hour,Adopt high-tech inset activated carbon in the air filter. Filter 99. 97% dust, pollen, smoke, odors, mold spores, and pet dander. The air filters catch particles as small as 0. 3 microns. Smart: Set the boot time and feel the fresh air once getting home.Lock the screen with the child lock function to avoid misoperation by kids/pets. Quiet and Low power consumption: Brushless DC motor achieve 23 dB in sleep mode keep fresh air for your baby child pets. More Convenient: 3-Level Fan Speeds, 3-Stage Filtration System,Adjust the air purifiers fan speeds for different needs. Warranty: products have a One Year warranty from the date of purchase and Free Extended One-Year warranty after register your product with your orderID and purchase date.