VisionPro 8000 with RedLink, 18-30Vac or 750mV, 7 Day Programmable, Up to 3 Heat/2 Cool Heat Pump or up to 2 Heat/2 Cool Conventional when used Standalone, Up to 4 Heat/2 Cool Heat Pump or UP to 3 Heat/2 Cool Conventional when used with the Equipment Interface Module, Heat-Off-Cool-Auto-Emergency Heat System Switching, 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 Hardwired, Screw Terminals, 5-90% RH Non Condensing Operating Humidity Range, 10-60% Humidification Setting Range, 40-80% RH Dehumidification Range, Includes a Set of Universal IAQ Contacts to Control Humidification, Dehumidification or Ventilation