Description: Function -- This Refrigerator Thermometer can monitor 3 kinds of temperature and all displayed simultaneously, MAX and MIN temperature records of past 24 hours for home indoor, outdoor and refrigerator. Large Digital LCD Display -- you can easily read the data. Record minimum and maximum temperatures and easily monitor temperature changes. Low Energy Consumption -- Working Voltage 1.5v, Ultras-low power consumption;It can be converted between Celsius and Fahrenheit. Easy to Install and Operation -- Mount display unit directly to your refrigerator or freezer using the magnets on the back, hang on wall or just place on the table. The wireless sensor can clip on door or hang on the wall. Application -- Can be used it in the fridge, freezer or outdoor, monitor the temperature change easily, providing double protection to your food. Specification: Measuring Temperature Range: -20°C~50°C (-4°F~122°F) Accuracy: ±1°C(±2°F); resolution: 0.1°C(0.2°F) Operations ON : Press ON to turn item on. OFF : Press off to turn off , then it will turn back on, the clear/reset function. Battery Replace the battery when the reading becomes erratic or the display clarity fades, Using a .open the screw and ABS shell, use new battery. Size Chart: 87x45mm/3.43x1.77inch Package Includes: 1* Refrigerator Thermometer 1* Manual(4 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!