Founded in 1902, 3M is a global diversified technology company known for its innovation and product diversity, producing tens of thousands of innovative products. In the modern world, 50% of the world's population is exposed to 3M products on a daily basis, directly or indirectly. The highlight of 3M car air purifier is that it adopts the purification method of activated carbon and filter for different harmful substances in the air, which has strong purification ability. However, the price is more expensive, 699 yuan, and the replacement cost of the filter is also as high as 300 yuan, which is suitable for users who are not sensitive to price.