To turn the Stylus Sphere on, press power button. The red LED will light up indicating the curling brush is turned ON. To select the desired temperature press the top button until reaching the desired temperature. A blinking light means that the curling brush has not yet reached the selected temperature. A steady red light means the curling brush has reached the desired temperature and is ready for use. It is highly recommended not to use the higher temperature settings unless you have healthy, coarse hair. If your hair is fine or chemically treated, you should only use the lower temperature settings. Use the Stylus Sphere Thermal Curling Brush on dry hair only.