Rf refers to radio frequency heating, which can heat many substances including water, various metals, plastics, food, wood, paper, textiles and so on.

Its heating principle is to use radio frequency energy to make molecules move at high speed, thus heating objects. Because the speed of molecular movement in an object is related to the thermal energy of the object itself, when the speed of molecular movement in an object is accelerated, the thermal energy of the object itself will also increase, thus achieving the purpose of heating.