Mini Air Purifier Compared with other air purifiers, this USB air purifier is small and convenient for your travels. It can effectively remove odors, pet odors, kitchen utensils, second-hand smoke, etc. in hotel rooms, kitchens, bathrooms and toilets, and keep the air fresh Low noise, environmentally friendly, healthy: this filterless air purifier allows you to plug and play without changing expensive accessories. Negative ion purification function: the air ionizer generates negative ions, which combine with the positive ion dust in the air. air and sink to the ground to avoid the danger of inhaling floating objects. And can remove cigarette smoke, oil fumes and other particles. Effectively freshen the air and improve sleep quality. Release 60 million negative ions to deactivate harmful dust carried by positive ions in the air. Easy to use, plug and play.