... in ozone, the ozone in the air even with a low density (for example 0.1ppm) can irritate person to have mucosa, headache ... no ozone produced. They are the best environmental protection products for the people.The UV sterilizing lamps (include ozone-free lamps ... reaction, etc. They are the best and cheap disinfectors used for air, food, water disinfection and apparatus disinfection in families, kitchens ...