Negative ion purifier, release high activity, small particle size negative ions, actively kill most harmful bacteria in the .The portable purifier is charged for 05 hours and can work efficiently for 24 hours to meet the purification needs of the day.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 .Quiet below 30 decibels, no noise during use, so that your work, study and sleep are not disturbed.Gift of Love: stylish design make your surroundings more colorful, more . Perfect gift idea for family and friends.Product Name : PurifierInput : 01WInput Voltage : DC 5VNegative Ion Concentration: 10,000,000pcs / cmFunction : purificationBacterial Reduction Rate : more than 96%Frequency: 2KHzCharging : USBBattery : 37V 200MAHProduct Weight : 30gColour: whiteMaterial: PCSize: 77x52x3cmPackage Contents:1 * purifier1 * usb cable1 * lanyard1 * InstructionOnly 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.