1、【DEEP STERILIZING AND REMOVING ODOR】Donut ozone air purifier uses advanced three-dimensional ozone mode to easily remove carcinogens such as formaldehyde, benzene, and quinone in the air, as well as odors such as smoke, paint and odor, creating a comfort2、【SILENT PURIFY】Using 10db quiet operation, effectively reduce noise, let you enjoy quiet, do not disturb sleep. A button that fits the finger's arc and starts with a single tap.3、【USB RECHARGEABLE FOR LONG TIME USE】Adopted USB interface, 700 mAh large-capacity lithium battery can be used for 7 days, continuously to remove airborne contaminants, and the mini design allows you to carry it anywhere for use.4、【MORE THAN A PURIFICATION AND STERILIZATION MACHINE】Our air purifier is widely used in refrigerators, shoe cabinets, wardrobes, Leather Products, travelling cases, it also can be used for the sterilization of baby products, tableware and daily toiletries5、【SATISFACTION GUARANTEE】We care for all customer's feeling. If this product does not meet or exceed your expectations, please send it back for a 100% refund no questions asked.