... Thanks to compatible for cigarettelighter, just simply plug into cigarette lighter without any power adapter.Negative Ion:Negative ions ... , and safe.Don't include any chemicalSpecification:Type Compatibility:Cigarette lighterInput Voltage:DC 12 ~ 26VInput Current:30 mAOutput Voltage ... : < 0.8 WSize: 92mm(L)*37mm(D) High quality Car Filter--Ozone can filtrate pollutes air, add fresh oxygen, eliminate ...