New USB Purifier For Home And Car Desktop Indoor Filtration And Purification Features: Large area: This purifier has a large purification area, allowing every place to be purified. USB powered: This purifier is USB powered and can be used at home or in cars. Low noise: This purifier is very quiet, with a working frequency of nearly 20 decibels, making it very suitable for use in the bedroom or sleeping. Powerful motor: This purifier has a larger filter and a powerful motor, which can improve purification efficiency. Efficient purification: This purifier can absorb micro particles such as ,, etc. Product Description: Size: 20.5 * 12 * 12CM Applicable area: below 10 meters Power supply : USB power supply 5V/2W include 1x purifier, 2x filter screen 1 * Filter 1x aromatherapy tablets 1x data cable