Used a couple of times, but haven't used it since, so I'm selling it. It plugs into a wall outlet and can be used anywhere. There is no instruction manual. It adopts a 5-in-1 multi-functional mode, with functions such as deodorization, formaldehyde removal, and negative ion air purification, suitable for bathrooms, bedrooms, storage rooms, garages, closets, pet nests, etc. It's mini-sized, so it won't get in the way wherever you put it. Product size (width x depth x height): 5x5x9cm. ★【Intelligent Ozone Equipped】This ozone deodorizer has three modes for generating active oxygen (ozone): 30 minutes, 60 minutes, and continuous cycle. With the strong oxidizing power of ozone, it powerfully removes harmful substances in the air, deodorizing various odors such as toilet odors, sweat/body odors, food odors, garbage odors, sewage odors, tobacco odors, and mold odors. It also has a certain effect on formaldehyde removal.