The electric component is made of positive temperature coefficient electric resistance (PTC). The glue gun will heat up very fast and can adjust to constant temperature, which can prevent damage by overheat, saving energy and prolonging the life as well. Application : Toys, artificial flowers, Christmas trees, decorations, jewelries, wooden objects, etc. Insert the glue stick into glue gun tube through the gun tail. Put on power supply and switch on it's button to preheat the gun for 5-8 minutes. Once heated, pull the trigger and apply the hot glue wherever required.