WHITE-RODGERS™ Thermostat, 80 Series, mV to 30 VAC Battery, 20 to 30 VAC Hardwire, 1.5 to 2.5 A, 50/60 Hz Frequency, 2 Heat/1 Cool Heat Pump Stages, Switch Position: HEAT-OFF-COOL-AUXILIARY/EMERGENCY (System), AUTO-ON (FAN), 4.5 sq-in Display, 0.5 deg F at 6 deg F/hr Fast, 0.75 deg F at 6 deg F/hr Medium, 1.9 deg F at 6 deg F/hr Slow Heating, 0.9 deg F at 6 deg F/hr Fast, 1.2 deg F at 6 deg F/hr Medium, 1.7 deg F at 6 deg F/hr Slow Cooling, 0.9 deg F at 6 deg F/hr Fast, 1.2 deg F at 6 deg F/hr Medium, 1.7 deg F at 6 deg F/hr Slow Heating Pump (Heating and Cooling), 0.5 deg F at 6 deg F/hr Fast, 0.75 deg F at 6 deg F/hr Medium, 1.9 deg F at 6 deg F/hr Slow Heating Pump (Auxiliary) Differential, 45 to 99 deg F Settings, 32 to 105 deg F Ambient, 90% Non-Condensing Humidity, +/-1 deg F Accuracy, Battery, Hardwired Power Source, Horizontal Mounting, Dimensions: 3-3/4 in H x 6 in W x 1-1/8 in D, White