MYLIFEUNIT Air Ionizer with 100 Million PCS/CM&sup3; Negative Ion, Car/Home/Office 12V Electricity Adapter. (Yellow) Car Air Purifier Negative ion density :&gt;100 Million PCS/CM Car air purifier which adapted the advanced push-pull wind channel technology. The device generates very large amount negative ions which is healthy for human body, brings persons enter the nature-like environmentimprove the air quality in the car effectively, so the driver will enjoy the clean and comfortable space in the car. 2 PCS Electricity Adapter : enjoy the high concentration of negative ions anywhere, such as in the car,office and at home.Just like stay in the forest. Product Certifications: CE (European conformity marking that indicates that the product it is affixed to complies with all relevant Europeanhealth safety and environmental protection legislation requirements),FCC (Federal Communications Commission), RoHS (Restriction of Hazardous Substances)