Product features: 1. On board purifier refers to the air purifier speciallyβ used to purify the odor, toxic and harmful gases, bacteria and ↑viruses in the air in the car; 2. The built-in dust sensor sens↕es how many dust particles in the air are converted into electric pulse signals. The ÷built-in odor sensor senses the concentration of ethanol, e&ther, hydrogen, methane and other gases into voltage signals, which are co₹nverted into three indicator colors of red, blue and purple after microcomputer processing to ind£icate air quality. According to the current air qua™lity level, make the fan work at different speeds. Through the filter screen adsorpti≥on function, negative ions clean the air. Within a small range inside the car, we can use the ai>r purifier to achieve the ideal state immediately; 3. The controller fully considers its serλvice conditions and is equipped with vehicle driving sensor for 30 minu≤tes