ALLEN USB Car &Home Air Purifier Portable Mini Hepa Filter Ionizer Freshener DC 12V Car Adapter Oxygen Bar Green Simple but stylish.Swiss industrial design: mellow line, fashionable color and simple outline. Sturdy and durable for its supreme material Composite filter & high-efficiency purification.The super built-in composite filter can perfectly eliminates various particles as PM 2.5, smells and bacterial: the synthetic filtration rate is almost up to 99.9% Ion purification & air fresh.With the high-density negative ionizer to generate above 5 million ions, the fresh air is all around the surrounding as you are placed in nature Gentle background lighting.Adopting the lighting design of the Burj Al Arab Hotel, the background lighting is always a gentle touch Enjoyable both at home and in car.No matter at home or in car, the USB port cable will never stop the purifier bringing clean air