Standard Features - Familiar Heating/Cooling Switch Allows you to change your heating/cooling status - Easily Adjust Temperature By twising the cover ring. "Clicks" you can feel and hear confirm your changes - Lighted Display Illuminates with the touch of a button; offers easy reading in a dark room or hallway - Familiar Size/Style - Same as the traditional Honeywell Round Thermostat - Model Numbers T8775A1009, T8775C1005 - 5-Year Warranty