Modern Design - The modern and compact design makes it blend with whatever you wear without attracting negative attention. Rechargeable - With our lasting charge you can feel clean, refreshed, and protected whether you're at work, out at an event, or just relaxing at home for the whole day! Highly Effective Against Airborne Diseases - The negative ions that the produces will connect to any airborne pollutant, bacteria, and any other illness-carrying particles due to their electrostatic charge. This makes the contaminated air particles too heavy to stay airborne, forming a microscopic health shield to protect you for any situation. Filter Less - Now you never have to worry again about dealing with expensive and burdensome filters for your air purifiers. The air purifier has an ever lasting purifier that runs on just a quick charge. Portable - You can wear it around the neck, lightweight and portable, can be used anywhere. The product does not need to add any water or liquid, beginning purify the air. Product Name : Air Purifier Working hours: 20-24H Charging time: 1H Applicable Area: 10㎡ Function : Air purification Working Principle: Negative ions colour:Silver material:ABS size:4x7x2.7cm Package Contents: 3 * hanging neck purifier