1. Breathe cleaner air: This personal air freshener release more than 20 million negative ions, push pollutants away from your personal space, eliminate most of the smoke, cooking odors and even PM2.5 air pollutants, thereby improving mood and Sleep. 2. Carry it with you: Since 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 such clothes produce fresh air. 3. No noise: using advanced fans, the sound is very quiet during operation, and no noise is generated during work or rest 4. Easy to use: easy to operate, convenient and fast, just the button to enjoy fresh air. 5. Long lasting: The portable air purifier has a USB charging port, which can be for 1 hour and can be used for about 20 hours (depending on actual usage) to fresh air. product description: Product Name: Air Purifier Control method: button Battery capacity: 200MAH Charging time: 1h Use time: 20-24 hours Working