Standard Features - Weekday/Weekend Programming One program for the weekdays and a separate program for the weekends with 4 program periods per day - Easy to Use Basic operation keeps programming easy - Precise temperature control of +/-1 F to maximize comfort. - Works with heating and cooling systems plus heat pumps without back-up heat - Does not work with heat pump systems with back-up heat, multi-stage heating/cooling systems and electric baseboard heat (120-240V) - Model: RTH2300B - 1-year warranty