Mini Air Purifier This compact USB plug-in air purifier is designed for easy portability, making it ideal for travel. It helps remove odors from hotel rooms, kitchens, bathrooms, toilets, pet areas, cooking spaces, and second-hand smoke, helping to keep the air fresh.Negative Ion Purification The device functions as an air ionizer, releasing negative ions that attach to positively charged particles like dust, smoke, and other airborne pollutants. These combined particles become heavier and fall to the ground, reducing the risk of inhaling airborne contaminants. This process helps eliminate cigarette smoke, cooking fumes, and other particulates, contributing to improved air quality and a more comfortable environment.Low Noise & Maintenance-Free With no filters to replace, this air purifier operates efficiently and quietly, with a noise level of 36 dB. Simply plug it into a USB port to start useno additional setup or maintenance required.High Ion Output Emits up to 20 million negative ions per cubic centimeter, enhancing air freshness and supporting a cleaner breathing environment.Plug and Play Easy to use: just connect to a USB power source for immediate operation.Product Name: USB Air Purifier Negative Ion Concentration: 20 million pcs/cm Power Plug Type: USB Working Principle: Negative Ion Technology Noise Level: 36 dB Airflow Rate: 301400 cubic meters per hour Recommended Room Size: 3140 square meters Color: Black Material: ABS + Metal Package Contents: 2 x USB Air Purifiers Note: The package includes only the items listed above. Other accessories are not included. Due to lighting and display differences, the actual product color may vary slightly from the images. Measurement tolerances may vary by 13 cm.