2xAir Purifier Portable Personal Wearable Necklace Negative Anion Description: Personal Air -- This Air Necklace releases 1800-2000 million negative oxygen ions, these contributing ions will combine with pollutants and other unhealthy particles. High effectively purifying the surrounding air and pushing harmful substances away from you. Easy to use -- You can wear this portable purifier around your neck using its strap. Or it can be placed on the nightstand next to your bed. and back-clipped design can make you put it on your collar, stable and infallible. Long Working Time -- Built-in 300mAh rechargeable battery, and energy-saving, 24 hours of battery life on a single charge. The USB charging port can be charged by pc, laptop, power charger, adapter, car. No Noise -- This air necklace cleaner is very quiet during operation, and will not disturb you during work or rest. Wide Application -- it can wear on your neck, hand, bag, collar, baby carriage, camping or just put on your desk. air thats completely natural and healthy to breathe. Specifications: Material:ABS Size: 78x40x20mm/3.07x1.57x0.79inch Battery Capacity: 300mAh Voltage: DC 5V Power: 1W Control method: Button : 2-3 hrs Package Includes: 1 Piece Purifier 1 Piece USB Cable 1 Piece Lanyard(2 Pack)