Digital Fridge / Freezer Thermometer -- Waterproof, LCD, Wireless & Hanging Hook Refrigerator freezer compartment LCD digital thermometer with hook Waterproof fashion: waterproof structure, IPX3 level, can resist the humidity of the refrigerator or freezer, more durable and safer Easy to operate: just press "°C/°F" to switch between Celsius and Fahrenheit Freely at 4°C to 7.9°C and display "Frost Alarm" Easy to read: large LCD screen, clear reading at long distances Frost warning: frost warning range: 4.0°C to 7.9°C When it runs within this limit, a frost icon will appear on the screen Specification Measuring temperature range: -20°C to 60°C Accuracy: ±1°C/±2°F Resolution: 0.1°C/0.2°F Waterproof rating: IPX3 Battery: 1 x CR2032 battery, 3V (included) The refrigerator thermometer can be turned off by a switch to save electricity. The package includes: 1 x thermometer 1 x User Manual notes: If the temperature is lower than -20°C, it will display: "LL.L" If the temperature is higher than 60°C, it will display: "HH.H" When there is no display on the screen, please install a new battery Please don't leave it in the frozen layer, in case it stops working.