Function depends on Plasma,Perfume,Lithium battery and car charger. Product Function:1. Plasma (Anion) air purificationAdopting plasma solo ... dust and static electricity in air, purify polluted substance from car off gas, such as carbon monoxide, ex nitride ox ... ease stress and anxiety.2. Lithium battery power systemUnder the condition of car power-off, use Lithium battery power system to make the ...