[Large LCD display and waterproof function] - Thanks to the large, easy-to-read LCD display, you can read the measurements at a glance. This is a great help for people with poor eyesight. IPX3 waterproof construction is resistant to moisture in the fridge or freezer, so make sure it works safely and consistently. [Record minimum and maximum temperatures] - Provides historical temperature readings. With this function, you can easily monitor temperature changes inside your fridge and protect food safety in two ways. [Smart and simple operation] - Easy to use thermometer with just 3 buttons. Simply press the On/Off button to turn the thermometer on/off. Press the C/F button to select degrees Celsius/Fahrenheit. Press the CLR button to delete the maximum/minimum record. Restart the thermometer and the maximum/minimum record will be reset. [2 portable placement methods] - You can place the stand on a table or turn it upside down and hang it on a fridge shelf with hooks. The mini design does not take up too much space in the fridge. It is very compact and easy to transport. [Temperature range and accuracy] Temperature range -20 to 50 C (-4 F to 122 F) with high accuracy ( 1 C / 2 F). You can use it in refrigerators, freezers or as a room thermometer to ensure food safety or for other purposes. With its user-friendly design, the digital freezer thermometer is the perfect assistant for food preservation Maximum/ minimum temperature recording Large, clear LCD display Keep it to one side or connect it up 3 simple press C/F switches Suitable for freezers, refrigerators, homes, restaurants, bars, cafes, etc. Size: 88*60*24mm Weight: 45g How to replace the battery: If the reading becomes unpredictable or the clarity of the display is reduced, replace the battery. Open the screw and ABS case and replace with a new CR2032 battery. Please note: Restart the thermometer and the maximum/minimum temperature will be reset. Restart it after receiving an error message.