The transformer changes the common 220V household current to 14V. Simply place the terminals at the ends of the wire, and the wire will heat up automatically. The wax will be attached on the wire and you simply have to apply it with your hand. • TIP: It would be helpful to place the frame horizontally, over a flat non-flammable plate smaller in size than the inside of the frame, so that it is in contact with the wire. Thus, the artificial sheet will not be damaged due to excessive heating (it could melt and tear), and you can apply enough pressure with your hand! The transformer is not waterproof. It should not be in contact with water.