Breathe cleaner air: This personal air freshener will release more than 3 million negative ions, pushing pollutants away from your personal space, eliminating most smoke, cooking odors, and even PM2.5 air pollutants, thereby improving mood and Sleep.Take it with you: Because this mini air purifier comes with a Lanyard, 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.Long-lasting: The portable air purifier has a USB charging port that can be charged for 1.5 hour and can be used for about 12 hours to ensure fresh airEasy to use: easy to operate, just press the simple operation to enjoy the fresh air,No need to replace consumablesFunction: Air purification, smoke and deodorization, dust collection, and elimination of radiation static electricity.Product Name: Portable Neck Neck Negative Ion Air PurifierOutput current: 20mAOutput power: Less than 1WInput: 5V / 0.1AAnion content: 300wCharging time: about 1.5 hourApproximate use time: 12 hoursLithium battery capacity: 400mAhUsable area: less than 10Working environment: -10-45Features: 4 gears mode selection, digital display shows gearssize: 90x37mmMaterial:ABScolour:WhitePackage Contents:1 x purifier1 x lanyard1 x keychain1 x charging cable1 x manualOnly 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.