Personal Wearable Air Purifier Negative Ion Generator for Travel Home

characterized in that the air cleaner can generate negative ions. Anion be used to enhance the body's metabolism and homeostasis.Maximum efficiency: our personal portable air purifiers can release as many as 15 million negative ions, thereby reducing energy consumption and energy efficiency.Mini Portable: You can wear it around the neck, lightweight and portable, can be used anywhere without noisy. The product does not need to add any water or liquid, beginning purify the air.Gift of Love: stylish design make your surroundings more colorful, more fun. Perfect gift idea for family and friends.Input voltage:3.7V (Battery), 5V (USB Power)Power consumption: less than equal 0.5WCharging time: About 45 minBattery life: About 8-10 hoursAmbient temperature (operating): -5 Celsius~ 45 Celsiuscolour: blackMaterial: ABSsize: 45x13mmPackage Contents:4 x air purifier4 x usb cable4 x LanyardOnly 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.