Hanging Neck Air Purifier Personal Wearable Mini Portable 200 Million Negative Ion Generator Air Purifier 120H1. Breathe cleaner air: This personal air freshener will release more than 100 million-200 million negative ions, remove pollutants from your personal space, eliminate most of the smoke, cooking odors and even PM2.5 air pollutants, thereby improving mood And sleep .2. Take it with you: Because this mini air purifier comes with a necklace, it can be worn around the neck. During the journey, in public places or other places with poor air quality, wearing this kind of clothing can create a fresh air area.3. Long-lasting: The portable air purifier has a USB charging port,700 mAh battery that can be charged for 1.5 hour and can be used for about 120 hours to ensure fresh air4. Silent operation, No need to replace consumables, suitable for various scenarios, purifying the surrounding environment anytime, anywhere5. Best Christmas Gifts: stylish Christmas design make your surroundings more colorful, more fun. Perfect gift idea for family and friends.Product name: hanging neck air purifierNegative ion concentration: 10 million-20 million pcs/cmRated voltage: DC5V/1.0APower: 0.1WMute effect: 18DBCharging method: USBBattery capacity: 700mAh/3.7VCharging time: 1.5hUse time: low gear use time: 120h; high gear use time: 40hApplicable area: 10mWorking principle: negative ionControl method: buttonApplicable people: especially suitable for children, the elderly, pregnant women and those who are allergic to pollen and peculiar smellColour: Silver / Blue / Rose GoldMaterial: ABSSize: 7.3 x 4 x 2cmPackage Contents:1 x air purifier1 x necklace1 x charging cableOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.