WHITE RODGERS 1F76-357/L37-767 LOW VOLTAGE ELECTROMECHANICAL THERMOSTAT COMFORT SET CLOCK 24 VAC ONLY:HEAT-OFF-COOL / FAN:ON-AUTO AA BATTERY BACK-UP(BATTERY NOT INCLUDED) HEATING ANTICPATOR:0.15 TO 1.0 AMPS / TEMPERATURE RANGE:50 TO 90 FAHRENHEIT DIMENSIONS:H 3 3/4" X W 6" X D 2 1/2"