The hanging type has two small blowers inside supporting wind, wind can be adjusted in a large range by a switch. blowers can produce a flow rich in magative and positive charges, can neutrolize the charges on the objects. When negative charges on the objects, they may attract the positive negative charges in the flow; when positive charges on the objects, they may attract the negative charges, then staic on the objects will be neutrolized reaching to the result of eleminating static.