Honeywell Home Rth2300B1038 5-2 Day Programmable Thermostat, White When your weekly schedule isn?t the same as your weekend routine, the 5-2 Day Programmable Thermostat gives you the freedom to program your weekday and weekend schedules independently, so your comfort settings can truly be on your time. This versatile thermostat is easy to use and has classic features like a backlit display, accurate operation, and manual overrides. The 5-2 Day Programmable Thermostat helps keep you in control, no matter your lifestyle. 5-2 DAY PROGRAMMING: Separate programs for the weekdays and weekends with 4 program periods per day including wake, leave, arrive and sleep PRECISE TEMPERATURE CONTROL: Precise temperature control of plus/- 1 degree Fahrenheit. Temperature range limits allow you to set minimum cooling and maximum heating temperatures DIGITAL DISPLAY: The display panel is backlit with an intuitive interface for one-touch access to setpoint temperature EASY INSTALLATION: Easy to install yourself and works with many heating/cooling systems, plus heat pumps without auxiliary heat REMINDERS: Built-in battery change and filter change reminders RETAINS PROGRAMMING: Retains programmed memory in event of power outage COMPATIBLE WITH: Gas, oil or electric furnace, Central air conditioner, Hot water system with or without pump, Millivolt system, Central heating and cooling system, Heat pump without auxiliary/backup heat. CANNOT be used on heat pumps with backup heat, multistage systems, radiant or line voltage systems.