These devices, once electrically powered, produce Ozone (O3) by transforming the Oxygen present in the air (O2). Ozone (O3) is a gas with a characteristic garlic-like odor and present in nature in the upper layers of the earth’s atmosphere that is formed by oxygen molecules (O2) in the vicinity of electrical discharges, sparks or lightning. The molecule of Ozone (O3) is very unstable, therefore extremely reactive, and, in particular, has a very high oxidizing power. Ozone has therefore long been known as an excellent disinfectant and is used in the field of air and water sterilization and in environmental deodorization (odor removal) by virtue of its bactericidal, fungicidal and inactivating effect of viruses.