Resideo TH4110U2005 Thermostat

T4 Programmable Thermostat, 20-30Vac, 1 Heat/1 Cool Heat Pump or 1 Heat/1 Cool Conventional, Heat-Off-Cool-Auto System Switching, Auto-On Fan Switching, Auto or Manual Changeover, Premier White, 40-90 Degree Heat Temperature Setting Range, 50-99 Degree Cool Temperature Setting Range, Dual Powered: Battery or Hardwire, Horizontal Mount, Programmability: 7 Day, 5-1-1, 5-2 or Non Programmable

TH4110U2005 is the updated version for TH4110D1007

TH4110U2005 is the direct replacement for PSP511C, PSP511A