Honeywell VisionPro 8000 with RedLink, 18-30Vac or 750mV, 7 Day Programmable, Up to 1 Heat/1 Cool Heat Pump or up to 1 Heat/1 Cool Conventional when used Standalone, Auto-On-Circulating-Follow Schedule Fan Switching, Auto or Manual Changeover, 40-90 Degree Heat Temperature Setting Range, 50-99 Degree Cool Temperature Setting Range, Battery or Hardwire