Thermometer Helps Monitor The Temperatures In Your Refrigerator Or Freezer. It Is Easy To Install. Simply Hang Or Set On A Shelf. Clearly Marked Dial Is Easy To Read. It Includes Both Fahrenheit And Celsius Graduations. Thermometer Ranges From Negative 20 To 80 Degrees Fahrenheit (Negative 28.9 To 26.7 Degrees Celsius).