This solar air purifier can release negative ion into the air and make the air inside you car .This car air purifier has a solar power battery on the top which can charge the device by using the sunlight.This car air diffuser can turn itself on along the car when you connect it with the car.This air purifier has a Press switch on the surface which allows you to use hand to Press it and start the device.This air diffuser is made of ABS material which is strong and durable for long time using.Type: Solar Car Air PurifierProduct voltage: DC-5VProduct power: 2WAnion concentration: 14 million / cm3Purification principle: HEPA filtration plus negative ionsColour:blackMaterial: ABSPackage Contents:1 x Air Purifier1 x car charger line1 x English manualOnly the above package content, other products are not included.Note: Light 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.