WHITE-RODGERS™ Thermostat, Classic 80 Series, mV to 30 VAC Battery, 20 to 30 VAC Hardwire, 1 to 1.5 A, 1.5 to 45 W Power, 50/60 Hz Frequency, Changeover: Manual, 1 Heat/1 Cool Stages, Switch Position: HEAT-OFF-COOL (System), AUTO-ON (Fan), 2.2 sq-in Display, 0.6 or 1.5 deg F Heating, 1.2 deg F Cooling Conventional Systems, 0.75 or 1.2 deg F Heating and Cooling Heating Pump Differential, 45 to 99 deg F Settings, 32 to 105 deg F Ambient, 90% Non-Condensing Humidity, +/-1 deg C Accuracy, Battery, Hardwired Power Source, Horizontal Mounting, Dimensions: 3-7/8 in H x 6 in W x 1-3/16 in D, White