Standard Features - Weekday/Weekend programming One program for the weekdays and two separate programs for Saturday and Sunday with 4 program periods per day - Easy to Use Basic operation keeps programming simple - Backlit display Easy to read, even in poorly lit rooms and hallways - Early Start function Adjusts the pre-heating/cooling of your home so you are comfortable at your programmed times - Precise temperature control of +/-1 F to maximize comfort - Display Options C or F temperature 12 or 24 hour clock - Compatible with heating and cooling plus heat pump systems - Does not work with electric baseboard heat (120-240V) or multi-stage heating/cooling - Model RTHL2410C - 1-Year Warranty