1.Apply a suitable medium(gel,aloe gel,essential oil,fat-burning milk, slimming radiofrequency cream)to the treatment area. 2.Place the handle on the treatment area and lightly press the handle's start button. 3.The handle will display a green or red light (green light indicates low energy,and the light will gradually turn red as the energy level increases). 4.Please be mindful of the energy level and immediately lower it if the sensation becomes uncomfortable.