Honeywell Home 24-Volt 5-2 day Touch Screen Programmable Thermostat 2 -Pack (open box)Easy to install, easier to use, with simple push button controls Smart response learning optimizes heating and cooling cycle times Flexible set and forget 7 day scheduling options Auto change from heat to cool Temporary and permanent hold settings Real time clock automatically adjusts for daylight saving time Program is retained in memory in the event of a power outage 12 hour or 24 hour time display Fahrenheit or Celsius temperature display