Simple and straight forward to install and use. The thermostat also has a real-time clock so it will automatically adjust for Daylight Savings Time.7-Day menu-driven programming with 4 periods per day.Set home and away temperatures to help save energy when you're not home. Temporary and permanent hold settings are also available for extended absences from home.Large touchscreen display makes it easy to set your preferred temperature or set a weekly schedule for automated adjustments.Auto changeover is helpful in climates where both air conditioning and heating are used on the same day. When the system is set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature so you can always be comfortable.Smart Response Technology allows the thermostat to learn how long the furnace and air conditioner take to reach programmed temperature settings, so you're comfortable at the time you expect.To protect the system and your compressor from damage, this thermostat contains a setting that forces the compressor to wait a few minutes before restarting. If activated during installation, the screen will also display an alert when it's time to replace your filter and alert you of low batteries.Backlit touchscreen display shows current room temperature and set point temperature simultaneously.Battery-powered or option to hard-wire (2 AA batteries needed if using battery power option.)Compatible with- single stage heating and cooling, multistage heating and cooling, heating only, cooling only, furnace (warm air), central air conditioning, heat pump without auxiliary heat, heat pump with auxiliary heat, hot water, steam or gravity, 750 millivolt, and gas fireplaces.