Specification: Product Name: Refrigerator Thermometer Material: ABS + Stainless Steel Size: 90*62*25MM Weight: 41 grams Color: White Measurement Temperature Range: -20°C~50°C (-4°F~122°F) Accuracy: ±1°C (±2°F); Resolution: 0.1°C (0.2°F) Waterproof structure, IPX3 protection class Displays maximum/minimum temperature values on screen Can be used as a stand or hung from a hook; automatic opening Working voltage: 3V CR2032 battery 1pc. Pack: Refrigerator Thermometer 4X Working: u ℃/℉: Press the °C/°F button to switch between Celsius and Fahrenheit. ON: Press ON to turn on the device. OFF: Press the power switch to disable the delete/reset function and then restart the refrigerator thermometer. Battery: When the reading becomes unstable or the display becomes unclear, replace the battery. Refrigerator Thermometer Use button batteries. Remove the screws and the ABS housing and use a new battery.