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 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 only 3 buttons. Just press the power button to turn the thermometer on/off. Press C/F button to select Celsius/Fahrenheit. Press the CLR key to delete the 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 doubly. 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. Specification: Measuring temperature range: -20~50 (-4~122) Accuracy: 1C (2F); Resolution : 0.1C (0.2F) Waterproof structure Display shows maximum/minimum temperature Tablet holder or hook hang Power supply: 3v, CR2032 battery, 1PCS operate: Power button: Press this button to turn the instrument on or off. C/F: Press the C/F key to switch between Celsius and Fahrenheit. CLR: Press the button to clear/reset MIN/MAX readings. Package Included: 1 * Refrigerator Thermometer Battery Replacement: p> Replace the battery when the reading becomes unstable or the display becomes less clear, use a CR2032 battery located under the battery compartment cover on the back of the instrument.