Temperature Range & Accuracy- The temperature range of -2050(-4~122) with high accuracy (1C / 2F). You can put it in the refrigerator, freezer Or use as a room thermometer for food safety or other applications. Large LCD display & Waterproof- You can read the measurement at a glance with an easy-to-read extra large LCD screen. Good helper for people who don't have the best eyesight. IPX3 Waterproof - Waterproof structure can withstanding the humidity of the fridge or freezer, ensure it works in a safe and consistent manner. Min & Max Records- It provides the historical temperature readings. With this feature, you can easily monitor the temperature change of your refrigerator and double protect your food safety. Simple and Smart Operation- Easy to use thermometer with only 3 buttons. Just press on or off button to turn the thermometer on/off. Press C / F button to select Celsius / Fahrenheit. Press CLR button to set Max / Min to delete record. If you restart the thermometer, the Max / Min record will be reset. 2 Portable Placement Ways- You can either place the stand on the tabletop, or flip the stand and use the hook to hang it on a cooling rack. Mini design won't take up too much space in your fridge. Precautions How to Replace the Battery: - Please replace the battery when reading becomes erratic or display fading clarity. - Open the screw and ABS shell and replace with a new CR2032 battery. 2.Notes: - If you restart the thermometer the max/min temperature will be reset. - Please start it if you get error info.