About this item Advanced 3 Stages Filtration: This air purifier has 3-stage filtration system, including pre-filter, ture HEPA filter and activated carbon filter, which can remove 99.9% of air pollutants, like dust, pet dander, smoke, house odor and particles as small as 0.3 microns. It can effectively improve indoor air quality and help you enjoy fresh air at home. Unlike the negative ion purifiers, this air purifier is 100% no ozone with CE , FCC and ROHS certification to ensure your safe use. 3 Fan Speeds and High Performance: The air purifiers has 3 modes to adjust the fan speed, including sleep mode, normal mode and strong purification mode. You can choose different modes and fan speeds according to the actual air quality and space size. The 360 strong purification mode make efficient air intake and exhaust, it will quickly clean and release 51-150m3/h of fresh air, which can improve the air circulation and provide healthier air in your room. Portable and Sleek Design: This portable air purifier has a compact size( 160*190mm) with an USB cable, which is portable enough to move from room to room. It is very suitable for use in small areas within 215sq.ft (20m3), such as the bedroom, office, kitchen, smoking areas ect. This small air purifier uses a high-grade white matte shell, looks elegant and sleek, which is both practical and decorative. Silent Tech and Easy Operation: The air cleaner adopts advanced silent technology and noise reduction fan blade design. In sleep mode, its sound can be as low as 22dB to create a quiet and comfortable indoor environment, which will not disturb your study, work or sleep. Using the filter air purifier couldn't be easier. Just press the same button to turn it on/off or control the fan speed.