It is mainly used to convert input and output voltage between voltage in different foreign countries. ^^ Small size and light weight, ideal for traveling to anywhere, very convenient. ^^ channel voltage Converter from 110/120V to 220/240V, also can change from 220/240V to 110/120V. ^^ Imported materials, high performance transformer and special circuit preciseness manufacturing, with long serving life. ^^ It can meet the use of various small appliances (under 30w). ^^ ^^ ^^ ^^ ^^