Fridge/Freezer Thermometer with Alarm The Fridge / Freeze thermometer is designed to detect the room temperature or temperature immediately outside the freezer or refrigerator. A convenient place may be the outside wall of the freezer or refrigerator. The probe sensor is designed to detect the temperature of a freezer or refrigerator and should be placed inside the compartment Room / Freezer or Refrigerator temperature display (°C / °F selectable) Temperature Measuring Range: -50 °C to +70 °C Selectable temperature alert for Freezer or Refrigerator (with preset temperature range) Loud beep alarm and flashing LED indication Temperature resolution: 0.1 °C