Honeywell Home Electric Heating Manual Thermostat, TH114 Series, 24 V, 0.5 A, AF/F Switch Position, External Electromechanical Relay Switch, Thermistor Sensing Element, Backlit Display, 1 deg F Differential Temperature, 40 to 86 deg F Temperature Settings, 32 to 122 deg F, Cycles per Hour: 4 CPH, 0.9 deg F Accuracy, Hardwire, 2.76 in L x 0.91 in W x 4.89 in H, White, For Use With: Aube RC840/RC840T Series Electromechanical Relays, Additional Information: Low Voltage, Non-Programmable