Ritetemp 7-Day Programmable Universal Thermostat With 4 program periods per day (each day of the week can be different), this thermostat automatically regulates your HVAC according to your schedule and lifestyle Compatible with all home central heating and cooling systems, including heat pumps Energy Star Compliant: Energy Star setting can save $100 per year when used properly Air filter alert reminds you when to change your air filter Large, easy to read, white LED backlit display