By simply pressing the single "Mode" button, the fan can be operated in any of its modes. With each press of the button, the mode will change as indicated by the lit LEDs (Light Emitting Diodes). The modes include low or high manual (the fan will constantly run) or low and high automatic (the fan will operate to maintain the set temperature displayed by the LED). The set temperatures include 60, 65, 70, 75 or 80 degrees Fahrenheit. The fan is turned off by either holding the button down for two seconds or continually pressing the button until the "Off" mode is reached (this is after High/80f).