Antifreeze Alarm Function: When the temperature is too low or too high, a frost symbol will be displayed on the refrigerator thermometer screen. Abnormal temperatures are easy to detect. Waterproof Design: Our digital refrigerator thermometer is waterproof (IPX3 waterproof rating), which ensures safe and stable operation. Easy to Use: Simply press the on/off button to turn on the thermometer and select Fahrenheit or Celsius. Digital Refrigerator Thermometer】This digital thermometer uses precision calculations to measure temperatures from -20°C / -4°F to 60°C / 140°F. High accuracy (±1°C / ±2°F). 3 Mounting Methods: The freezer thermometer can be placed, hung, or attached by magnet. So you have three methods to choose from to place and use it anywhere.