Honeywell 5-1-1-Day Electronic Programmable Thermostat: * ENERGY STAR-qualified * Large backlit display * Auto-change from heat to cool * Smart Response Technology * 1 program for the weekdays * Separate program for Saturday and Sunday (up to 4 periods per day) * Program to save up to 33 percent on annual heating and cooling costs (if used as directed) * Savings may vary depending on geographic region and usage * Straightforward display and buttons keep operation and programming simple * Easy-to-read display, even in dimly lit rooms and hallways * Continually adjust the pre-heating/cooling of your home, so you are comfortable at your programmed times * Compatible with heating and cooling, plus heat pumps * Auto-change from heating to cooling * Does not work with electric baseboard heat (120-240V) * 1-year warranty ENERGY STAR® Products that are ENERGY STAR-qualified prevent greenhouse gas emissions by meeting strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy. The ENERGY STAR name and marks are registered marks owned by the U.S. government, as part of their energy efficiency and environmental activities.