USB Mini Portable Air Purifier NecklaceCharacteristics: 1. Advanced pulse technology is used to release a large amount of oxygen anion. Latest double carbon brush negative ion generator design uses over 6 million negative ions to effectively remove harmful substances such as floating dust, smoke, formaldehyde and PM2. 5 from the air . 2. release a large amount of oxygen anion, kill harmful bacteria, mold and viruses, break down smoke, odors and formaldehyde, benzene and other harmful gases
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