Honeywell Programmable Thermostat, 24 Vac, Up to 3 Heat/3 Cool Conventional, Up to 4 Heat/2 Cool Heat Pump, Heat-Off-Cool-Auto-Em Heat System Switching, Auto-On Fan Switching, 40-86 Degree Setting Temperature Range, ± 1 Degree Accuracy, Auto or Manual Changeover, Vertical Mount, Includes Control Module, User Console, Outdoor Temperature Sensor with Mounting Clip