1.Lightweight and portable: This air purifier is small in size, easy to carry, and can be hung around the neck. No matter where you are, you can take it with you to help you breathe fresh air and protect your health.2.Effectively purify the air: The mini air purifier releases more than 15 million negative ions per cubic centimeter to remove dust in the air, effectively improve the blockage of the nose, protect your free breathing, and purify the surrounding air in daily life.3.Safe and no noise: Very quiet during operation, no need to worry about noise during work or rest. Easy to operate, you can turn on and off the button.4.Long-lasting and effective: You can install the battery, you can also use USB to charge, after fully charged, you can work for a long time up to 12 to 20 hours. No matter where you go, you can wear it on your neck at any time to breathe fresh air.5.Multifunctional purifier: This advanced miniature air purifier can capture dust, smoke, unpleasant odors and other harmful pollutants in the air. It can be hung on the neck, trouser hook, handbag, stroller, camping, hung on the wall or placed on the table. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia