The desktop air purifier features a premium filtration system that 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 of fan speed design, this air purifier can be adjusted according to your different needs. By pressing the auto button, this air cleaner with a dust sensor will accurately detect the air quality in the room and adjust the air quality to an 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. The clear touch panel is easy to understand, making the operation more convenient. This product does not meet California air cleaner regulation requirements, and can not be shipped to California.