Manual Thermostat, 1 H 1 C, Battery Assisted Power Stealing, 20/30VAC, HONEYWELL HOME, Mfr# T87N1000

Low Voltage Thermostat, Terminal Designations B, G, O, R, RC, W, Y, System Switching Heat-Cool-Off, Fan Switching Auto-On, Dual Transformer Compatible Yes, Power Method Hardwired, Voltage 20 to 30V AC, Mounting Round, Depth 1 3/4 in, Diameter 3 11/16 in, Color White, Control Range 40 Degrees to 90 Degrees F, Features Mercury Free, For Use With Gas, Oil, Electric, Forced Warm Air, Hot Water, Steam or Gravity, Cooling, 4 or 5 Wire Systems