Facilitates compliance with the recommended indoor temperatures for refrigerators (2-8 °C) and freezers (at least -18 °C). When the temperature is set correctly, food stays fresh longer and bacterial growth is reduced. The thermometer helps avoid unnecessary energy consumption and save on electricity costs. Color scale for easier reading. The thermometer can be stuck on (adhesive pad on the back) or hung in a suitable place. Temperature display in degrees Celsius. Temperatures of -18 degrees Celsius allow for the long shelf life of food without the addition of preservatives.