Car Anion Negative Ion Air Purifier Car Interior Supplies1. Using pulse tip technology to release a large amount of oxygen anions, using the latest double carbon brush double negative ion generator design, more than million negative ions, effectively remove floating dust, smoke, formaldehyde and PM2. 5 and other harmful substances in the air. 2. Release a large amount of oxygen anions and decompose smoke, odor and harmful gases, such as formaldehyde and benzene released from internal parts (such as bed