For use in refrigerators and freezers. Double scale: –40 to 27°C and –40 to 80°F. Completely enclosed bulb ensures accurate temperature readings. Rustproof case has stainless steel hangers and enameled aluminum scale. Accuracy: ± 1°C; ± 2°F. Dimensions: 124Lx32Wmm (4 15/16x1 1/4").