Large LCD Screen and Waterproof- You can read the measurements at a glance thanks to a very large, easy-to-read LCD screen. Ideal for those who do not have better eyesight. The IPX3 waterproof structure can withstand the humidity of the cold room or freezer, ensuring its safe operation. Simple and Smart Operation- Easy to use thermometer with just 3 buttons. Just press the power button to turn the thermometer on/off. Press C/F button to select Celsius/Fahrenheit. Press CLR key to delete Max/Min record. When you restart the thermometer, the Max/Min record will be reset. Wide Range & High Accuracy- The temperature range of -20~50(-4~122) with high accuracy (1/2). You can use it in a refrigerator, freezer or as a room thermometer for food safety or other occasions. Min and Max Temperature Recording- The refrigerator thermometer provides a historical temperature reading. With this function, you can easily monitor the temperature change of your refrigerator and protect your food safety in a double way. 2 Portable Placement Choices- You can either place the rack on the table or turn it over and use the hook to hang it on a refrigerated shelf. The mini design won't take up too much space in your fridge. It is very compact and comfortable to hold.