UV sterilization: The air purifier can irradiate microorganisms (bacteria, bacteria and other bacteria), disrupt nucleic acid functions, cause microorganisms to die, and achieve disinfection purposes. And it can effectively clean rooms up to 10-25 sqm.Does not use ultraviolet to irradiate the skin Effective HEPA filter: The HEPA class filter and the activated carbon filter efficiency work perfectly: filtering 99.97% of dust, pollen, smoke, odors, bacteria, PM 2.5, particles, dust mites, mold spores and pet dander can be filtered down to 0.3 microns. Ozone free. 3 Kinds of Light: our air purifier will automatically detect the air after turning on the machine within 3 minutes: a red light indicates the air is too bad, a yellow light indicates the air is average, and a green light indicates the air is good. Silent Air Purifier: air inlet and outlet 360 quiet air duct design, lowest and lowest noise level in filtered air is only 35 decibels. Create a completely calm and relaxing environment, which allows you to sleep peacefully without interference. Portable design: the weight air purifier is 200G, it is very small and light, perfect for the car, hallways, studies, bedrooms, offices, kitchens, etc. With a USB cable, you can use an adapter (USB interface), laptop or mobile power to charge.