1,Breathe cleaner air: This personal air freshener will release more than 5 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,Long-lasting: The portable air purifier has a USB charging port that can be for 40 minutes and can be used for about 8 hours to fresh air 4,Easy to use: easy to operate, just press the simple operation to enjoy air. 5,No need to replace consumables, silent operation, suitable for various scenes Product name: hanging neck air purifier Negative ion concentration: 5 million pcs/cm Input voltage: DC 5V Output power: 0.05W Rated frequency: 50 (HZ) Control : button Battery capacity: 110MAH Charging time: 40 minutes Use time: 8h Charging : type-c Working principle: negative ion Use environment: home, outdoor Colour:Carbon fiber color Material:ABS Size:54 x 32 x 17mm Package Contents: 1 * air purifier 1 * lanyard 1 * charging cable Only the above package content, other products are not included. Note: Light 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.