1F85U-42PR White Rodgers Multie Stage Programmable, 24V

Multie Stage Programmable, 24V W/Base * Blue Multi Stage 2H/2C Conv. or 4H/2C Heat Pump. Programmable 7, 5+1+1, 0 Digital Thermostat, Backlit Display, 24 Volts or Millivolt, EMR Recovery, Filter Change Reminder, System Switch-Heat, Off, Cool, Auto, Fan Switch-Auto, On, Profile-Horizontal, Dual Power (R-C) And/or Batteries. Requires common wire for continuous backlighting.