Winext Portable wearable Air purifier, Personal Mini Ionic Air Purifier ,USB Rechargeable. (green) The unique design as a ipod shuffle which has clip and string, convenient to use everywhere 24 hours. Always keep your surrounding air clean and safe. Newest generation patented product and the strongest unit for it's size producing more negative Ions and Ozone exactly as nature does after a thunderstorm. Winext PORTABLE AIR PURIFIER has been proven to kill harmful viruses and bacteria, smoke odor eliminator, eliminate bad odor smells . It can also dispel gas, prevent from catching a disease or a virus being spread through the air. and besides being a smoke odor remover and all the features mentioned above, it has even been proven to be highly efficient in relieving car sickness, nausea and sleepiness. Moreover, it also HIGHLY minimize the risk of Bird Flusuit for all crowd place. HOW DOES IT WORK - Our Winext Car Ionizer uses an electrical charge to release tremendous amount of anions (4M negative ions per cm3) which will remove microscopic the bad particles from the air. The ionizer creates negative ions which seek out positively charged particles, such as dust, dander and other allergens and then, once the positive and negative ions are bonded together, they become too heavy to float, and no longer affect the air quality of the surroundings USB charging cable is included with each unit. No Filters to Replace or Clean!