... and fresh the air inside the car(2)inhibit mould to growOzone can antiseptic, disinfection, and ultimately reductive into oxygen, ... purification, eliminate peculiar smell smoke, mould and harmful material, to prevent the spread of disease.(4)eliminate the car smoke ... and ozone concentrationsWorking Voltage DC 12V Brand Name gaoxin Type TO-898 Negative Ion Concentration 3000000 pcs/cm3 Purification way ...