1. Breathe cleaner air: This personal air freshener will release more than 10 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 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 air area. 3. Long-lasting: The portable air purifier has a USB charging port that can be for 1.5 hour and can be used for about 12 hours to air 4. Silent operation, No need to replace consumables, suitable for scenarios, purifying the surrounding environment anytime, anywhere 5. Easy to use: easy to operate, just press the simple operation to enjoy air. Product name: portable hanging neck air purifier Negative ion concentration: 10 million pieces/cm Rated voltage: DC5V/1.0A Current: 20MA Charging : USB Battery capacity: 150mAh Charging time: 1.5H Use time: 12H Applicable area: less than 10 Working principle: negative ion Control : button Applicable people: especially suitable for children, the elderly, pregnant women and those who are allergic to pollen and peculiar smell Colour: White Material: ABS Size: 50 x 50 x 17mm Package Contents: 1 x Air purifier (including lanyard) 1 x charging cable Only the above package content, other products are not included. Note: Light reflection 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.