7-Day Programmable Thermostat7 day programmable or non programmable thermostat, unique program for every day of the week. user option: 2 or 4 periods per day, temporary override and manual hold, programmable keyboard lock, speed slide(TM) for easy programming, selectable fahrenheit celsius setting, adjustable temperature swing (differential), adjustable 2nd stage heat offset, programmable air filter life timer monitor, easy view large back lit display, energy use monitor,