Product Description 20 Million Negative Ion Air Purifier Mini Portable Home Ion Generator USB Plug-in Car Air Purifier Mini Air Purifier: Compared to other air purifiers, this USB plug-in air purifier is compact and portable. It effectively removes odors from hotel rooms, kitchens, bathrooms, and toilets, such as pet odors, cooking odors, and secondhand smoke, keeping the air fresh. Negative Ion Purification Function: The air generator produces negative ions, which combine with dust ions in the air and settle to the ground, avoiding the harm caused by inhaling floating particles. It also effectively removes smoke, cooking fumes, and other particulate matter, freshening the air and improving sleep quality. Low Noise, Environmentally Friendly and Healthy: This filterless air purifier requires no expensive replacement parts and is plug-and-play. Releases 20 million negative ions, deactivating harmful dust particles in the air. Easy to use, plug and play. Product Name: USB Air Purifier Negative Ion Concentration: 20 million ions/cm³ Power Plug Type: USB Working Principle: Negative Ions Noise Level: 36 decibels Air Purifier Airflow: 301-400 cubic meters/hour Applicable Area: 31-40 square meters Color: Purple Material: ABS + Metal Package Contents: 1 * USB Air Purifier Includes only the above package contents; other items are not included. Note: Light reflection and different monitors may cause the color of the item to differ slightly from the actual product. Measurement tolerance is +/- 1-3 cm.