This desktop air purifier features a premium filtration system which can remove some particles in the air including mold, dander, dust, pollen, and other debris as small as 0.1 micrometers. Coming with 3 levels fan speed design, this air purifier can be adjusted according to your different needs. By pressing the auto button, this air cleaner with dust sensor will accurately detect the air quality in room and adjust the air quality to optimal level. What's more, the compact and portable design ensures that this air purifier is suitable for placing in your home and office. The air purifier can operate at a decibel as low as 50db when working, which will not bother your work, sleep or study. Clear touch panel is easy to understand, making the operation more convenient. Note:This product does not meet California air cleaner regulation requirements, and can not be shipped to California.