With a single 70 Series thermostat, you can economically upgrade to digital accuracy and energy savings... without any decorating touch-ups. It's new low-profile design covers the footprint of the four most common mechanical thermostats used today. So There's no wall re-painting and no wallplates required. And it's battery powered, making it easy to install and compatible with most heating/cooling systems. The 70 Series is perfect for you if you want a quick and easy digital upgrade. White-Rodgers 1F78-144 Thermostat, Single Stage, Non-programmable Features: Battery powered for maximum compatibility. Fossil fuel or electric heat compatible. Large LCD with backlight. Selectable Celsius or Fahrenheit temperature display. Includes O and B terminals. Classic White color.