This Personal wearable necklace air purifier can removes duts,smoke,germs,pollen.It helps people who smoke, people who are susceptible to pollen allergies.Negative ion concentration:7-19.99Million/cm³. Charging speed:2min/1m³.Silence working.Charging time:1h.
Best Portable Personal Usb Ion Ianion Anion Mini Wearable Negative Ionizer necklace air purifier Pm2.5.