Mmiao Car Air Purifier, Ionic Air Purifier, Air Freshener, Removes Cigarette Smoke, Bacteria, Odor Smell - Helps with Allergies - Mini Air Cleaner Gadget Smoke Eater Eliminator Remover (Black) Release large amount of negative ions that can effctively remove dust,pollen,smoke and PM2.5 in the air. Kill harmful bacteria viruses and dispel unpleasant odor by generating safe amount of ozone. Enhance metabolism and relieve fatigue.