The 2246008 is a 2-stage heat and 2-stage cool heat pump thermostat. This thermostat features 3 programming options.
The 7 Day option gives you the most flexibility in your programming options. It allows each day to be programmed differently, some the same and some differently or all days can have the same program.
The 5-2 Day programming options allows you the flexibility of setting your weekdays differently than your weekends while the 5-1-1 Day programming you have weekday programming and a separate program each for Saturday and Sunday.