Portable Usb Battery Multi-Function Dual-Mode Ozone Negative Ion Air Purifier $ 33.79 Product information: Function: Sterilization Working principle: ozone + negative ion Noise: less than 30 (dB) Air purifier air volume: 50 cubic meters/hour Product Category: Air Purifier Power supply mode: USB Rated frequency:-(HZ) Use environment: home, car, office desk, refrigerator, shoe cabinet, toilet Control method: push-button Applicable area: less than 10 Size Information: Size: 5957163mm Weight: 210g Note: About color difference: All pictures are taken in kind. Due to the slight deviation of the color of the product during the display, photographing and drawing process, the actual color shall prevail. Buyers who have strict requirements for color, please be cautious! Packing list: Air purifier X 1