The Honeywell Home RTH111B Non-Programmable Thermostat offers simple and reliable temperature control. It features an easy-to-use digital display with soft-touch buttons that make adjusting your heating and cooling systems a breeze. The digital display only shows the information you need to make your home the desired temperature so its straightforward to adjust. Plus, this thermostat features an Easy-access battery compartment and change battery reminder. COMPATIBLE WITH: heating, cooling and heat pumps without auxiliary heat options. Does NOT work with electric baseboard heat (120-240 V), heat pumps with backup, or multi-stage heating/cooling.