80 Series Blue Universal Single Stage, Multi-Stage (2H/2C) Or Heat Pump (3H/2C). Non-Programmable Digital Thermostat, Backlit Display, 24 Volts or Millivolt, System Switch-Heat, Off, Cool, Auto, Emer., Fan Switch-Auto,On, Profile-Horizontal, Dual Power (R-C) And/Or Batteries, Range 45-90? F. Terminals-RC, RH, C, G,W/E,W2,Y,Y2,O/B/6,L. Includes F61-2634 Wall Plate