Product description Only 30g, extremely lightweight, no burden to wear Removal of carcinogenic suspended particulates PM2.5 Removal rate of 99.9% Removal of deadly pollution poisons and formaldehyde removal rate of 99.9% 2 million negative ions per cubic centimeter 24 hours after fully charged Exclusive negative ion eddy current jet technology creates an ion barrier that prevents pollen, fine suspended particles and harmful substances from approaching the surface of the body Zero electromagnetic waves, zero noise and no harmful ozone Suitable for patients with hay fever, asthma, passive smokers, long-time passengers, frequent insomnia, anxiety, long-term use of 3C, flight or other public transportation Obtained the certification of Japan Remote Infrared Application Research Association Made in Japan The information about the product is provided by the supplier, this shop does not bear any responsibility for this In order to ensure the rights of both parties: Please be sure to record the video out of the box Please be sure to record the video out of the box If you do not open the box and record, the subsequent products are missing or damaged, no compensation or follow-up processing will be done~