For most 24V and millivolt applications for heating/cooling or heating only systems. This deluxe digital features 2 separate programs: 1 for weekdays and 1 for weekends. 4 temperature settings each day. Up to 4 time settings (2 set-backs) each day. Stores heating and cooling simultaneously. 50 F (degree Fahrenheit) to 90 F. Built-in freeze-up protection. 2 "AA" alkaline batteries to power thermostat (not included). Beige.