Honeywell Programmable Thermostat, 24 Vac, 7 Day Programmable, 40-85 Degree Setting Temperature Range, ± 1 Degree Differential Temperature, Relay Switching Action, White, 1 Heat/ 1 Cool, Vertical Mount, Remote Input for Telephone Controller, Heat-Auto-Cool System Switching, Auto-On Fan Switch Positions, Auto or Manual Changeover