Standard Features - 7-Day Programming Allows separate programming for each day - Display Straightforward display keeps operation and programming simple - Backlit Display Easy-to-read, even in dimly lit rooms and hallways - Smart Response Technology Continually adjust the pre-heating/cooling of your home so you are comfortable at your programmed times - Filter Change Reminder Keep your heating/cooling system operating at peak performance - Vacation Hold Option to adjust your program and have it automatically resume the normal settings in time for your return - Permanent Day and Time Your settings are always maintained; even during a power outage - Daylight Saving Time (optional) Adjusts the time automatically - Compatible With heating and cooling plus heat pump systems - Does not work with electric baseboard heat (120-240V). - 1-Year Limited Warranty