Make sure your appliances are taking good care of your perishable foods with this handy Refrigerator/Freezer Digital Thermometer. The built-in hook makes it super easy to hang from the racks inside your refrigerator or freezer, or it can stand on its own or attach to a metal surface with its magnet. The digital display gives you a clear reading of the temperature inside in either degrees Fahrenheit or Celsius. The Food & Drug Administration recommends keeping your refrigerator at or below 40°F (4°C) and the freezer compartment—or standalone freezer—should keep foods at 0°F (-18°C). By keeping an eye on your appliances' temperatures, you can avoid costly food spoilage and potential health hazards. The refrigerator/freezer thermometer comes with a replaceable 1.5V button cell battery and has an integrated on/off switch to conserve power.