Hanging Neck Air Purifier Small Portable Negative Ion Vehicle $ 21.83 Product information: Function: In addition to smoke and dust Working principle: negative ion Noise: 20 (dB) Air volume of air purifier: 51-150 cubic meters/hour Smart type: Smart display, built-in fan Product Category: Air Purifier Power supply mode: USB Rated frequency: 50 (HZ) Use environment: vehicle Control method: push-button Applicable area: less than 10 Color: Haoyue White, Obsidian Black Shell technology: oil injection plating Style: car, hanging neck, desktop Rated power: less than 1 watt Current: less than 40 mA Product size: 100X47X30mm Life time: 12 hours with fan and 135 hours without fan Packing list: Air purifier*1