Mini Purifier Compared with other purifiers, this -in purifier is small in size and allows you to travel easily. It can efficiently remove odors from hotel rooms, kitchens, bathrooms and toilets, pet odors, Cooking odors, second-hand smoke, etc., keep the Negative ion purification function: The ion generator generates negative ions, which are combined with the dust of positive ions in the and sink to the ground to avoid the danger of inhaling floating objects. And to achieve the removal of cigarette smoke, oil fume and other particulate matter. Effectively freshen the and improve the quality of sleep.Low noise, environmental protection and health: This filterless purifier allows you to work immediately without replacing expensive accessories, just plug it.Release 20 million negative ions, so that harmful dust carried by positive ions in the loses vitality.Easy to use, plug and play.Product name: USB purifierNegative ion concentration: 20 million pcs/cm plug type: USBWorking principle: negative ionNoise: 36 (dB) volume of purifier: 301-400 cubic meters/hourApplicable area: 31 (inclusive)-40 (inclusive)Colour: blackMaterial: ABS+metalPackage Contents:1 * USB purifierOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.