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 +/- 0.5°C. 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 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. This thermostat cannot be used on heat pumps with backup heat, multistage systems or electric baseboard heating. › See more product details