We are manufacturer of Ozone generator for water and air for household, restaurant, hotel. Ozone eliminates a wide spectrum of germs including cell spores, viruses, germs, and protozoan at room temperature within a few seconds, and the germs won't develop resistance. Ozone is non-chemical substances and noncorrosive. Also, it's non-poisonous as it will be reduced to oxygen in 20 minutes. Ozone has five great functions: Preserving freshness. Elimination of germs. Eliminates poisonous substances Eliminates bad odor Whitening For water purifier, we have two types: 1. Ozone sterilization faucet WE588, for household; 2. WE588 separation/great water volume type, for restaurants, hotels. Ozone water can replace the following products: bleaching water, disinfectant, Hand Sanitizer, mouthwash, the ointment for beriberi, aromatic,tincture of iodine, and so on. For air purifier, we have three types: Ozone Deodorant Machine 80% Ozone, 20% anion; 4 holes ozone air purifier O3-638, vehicle-mounted, 20% ozone, 80% anion; 16 holes ozone air purifier O3-628, 20% ozone,80% anion. They are the first air purifiers without motors and fans. They have four strong effects of sterilization, deodorization, Smoke elimination,and dust collection. No strainer+ no noise+ no fanmotor+high concentration anion+long service life= your choice!!! 1 piece/box.