7 Day Flexible Programmable Thermostat, 7 Day, 5-2 Day Or One Week Programming Compatible With Most Systems, Extra Large Backlit Display Shows Current Room Temperature & Set Point Temperature, Learns Your Heating/Cooling Cycle Times To Deliver The Right Temperature, Auto Change From Heat To Cool, Change Reminders For Filters & Low Batteries, Temporary & 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 Or 24 Hour Time Display, Fahrenheit Or Celsius Temperature Display, Short Cycle Protection, Requires 2 "AA" Batteries Not Included, Includes Honeywell Standard, Connector S16, Mounting Hardware & Quick Install Guide, Fan Operation, On/Auto/Circulate Settings, Circulate Keeps Air Moving Throughout Your Home, Selectable Temperature Range Stops.