1,Breathe cleaner air: This personal air freshener will release more than 50 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.2,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.3,Easy to use: easy to operate, just press the simple operation to enjoy the fresh air.4,Long-lasting: The portable air purifier has a USB charging port that can be charged for 0.5 hour and can be used for about 12 hours to ensure fresh air5. Functions: air purification, smoke exhaust and deodorization, dust collection, elimination of radiated static electricity, no need to replace consumablesProduct Name: Portable Neck Neck Negative Ion Air PurifierOutput current: Less than 30mAOutput power: Less than 1WInput: 5V / 0.2AAnion content: 5000WRated frequency: 15 (HZ)Lithium battery capacity: 230mAhUse area: less than 10Noise: about 13 (dB)Working environment: -10-45size:40x40x15mmMaterial:ABScolour:BlackPackage Contents:1 * air purifier1 * lanyard1 * charging cable1 * clipOnly 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.