This kind of product is mainly used for sedans in clearing air. 1. Main characteristic of the product: 1). It can quickly get rid of smog, keep the air away from second-hand smoking pollution, kill germs, and break up harmful gas such as formaldehyde and benzene, etc. The ratio of cleaning harmful germs is high to above 95%. It can also release high concentration negative ions. You will feel that it seems you are in a forest next to a waterfall, and the air around you is so fresh that it helps you to dispel tire and does good to your health. 2). It includes a equipment that releases sweet smell.