Feature:1. Portable: Wearable negative ion cleaner, small size, significant purification effect, excellent use. Suitable for use in a variety of scenarios such as running and fitness, office.2. Negative Ion Generator: A device to generate negative air ions, negative air ions, also known as "air vitamin", the air contains the right amount of negative ions to remove dust and purify the air. Intelligent chip to ensure that the micro cleaner stable release of negative oxygen ions, circular purification, free breathing.3. Multifunctional: This wearable air necklace can form a microscopic health protective cover, so you can enjoy clean air at any time, to improve depression, insomnia, mood, improve sleep quality.4. Ultra Quiet: No noise, low power consumption, 5 dB ultra quiet operation, to ensure the quality of sleep, while taking care of your dreams, not to be disturbed.5. Exquisite Gift: Environmental protection, no supplies, negative ion generator without replacement, elegant and beautiful design will be a beautiful gift for your loved ones.Specification:Item Type: Wearable Air NecklaceProduct Material: PlasticBattery Type: Lithium Ion BatteryBattery Capacity: 500mah (Shipped With Built In Battery)Product Power: <1W.Package List:1 x Wearable Air Necklace1 x Usb Cable1 x English User Manual