... , keep clear head, improve work efficiency. 3.Activate cells and prevent against radiation. 4.Anion can dispel dust, smoke, ... 7.Ozone can dispel musty, smoke, toilets smell and leather, paints release of formaldehyde, benzene and other toxic gases. 8.Rotate protective ... protect the USB plug. 10.Blue light as decoration, warm and fashionable. Technical dataElectrical source: 5V / DC (USB plug)/12V ...