Easy to use [Upgraded] A fridge thermometer with just two buttons. Press and hold the C/F button to turn the thermometer on or off. Simply press the button to switch the temperature between Celsius or Fahrenheit. Max/min button to determine the max/min display of 24 hours. Large digital display - Just a look from the room and you can easily read the display with its large and fat numbers. Ideal for people with poor vision. You can use this device in the refrigerator, zer or as a room thermometer. Three different placement options - Magnetic rod, stand and hook for hanging, either attach to the fridge door with the rear magnet, or use the stand to place it on the tabletop, and finally you can turn the stand over and use the hook to hang on a fridge compartment or your zer. Large temperature range - from -20/-4 to 60/140. When less than -30 /-22, "LL.L" is displayed, if the values higher than 60 /140, "HH.H" will be displayed. Please reminder: frost warning 4 C to 7.9 C, the frost symbol is displayed on the screen when it is within this limit. Built-in battery and full instructions (English language not guaranteed). Basic Information: 1. Accuracy: 1(2); 2. Weight: 1.9 ounces / 54 grams. 3. Size: 2.64 x 0.9 x 0.39 inches / 6.7 x 2.5 x 1 cm. 4. Power: button battery 1 x 3 V CR2032 (included). 5. Measuring temperature range: -20 ~ 60 / -4 ~ 140 . Main functions: 1. A fridge thermometer with just two buttons. Press and hold the C/F button to turn the thermometer on or off. Simply press the button to switch the temperature between Celsius or Fahrenheit. Max/min button to determine the max/min display of 24 hours. 2. Large digital display - Just a look from the room and you can easily read the display with its large and bold digits. Ideal for people with poor vision. You can use this device in the refrigerator, zer or as a room thermometer. 3. Three different placement options - Magnetic rod, stand and hanging hook, either attach to the fridge door with the rear magnet, or use the stand to place it on the tabletop, and finally you can flip the stand over and use the hook to hang on a fridge compartment or your zer. 4. Wide temperature range - from -20/-4 to 60/140. When less than -30 /-22, "LL.L" is displayed, if the values higher than 60 /140, "HH.H" will be displayed. 5. Please reminder: frost warning 4 to 7.9, the frost symbol is displayed on the screen when it is within this limit. Built-in battery and full instructions (English language not guaranteed). Package includes: 1 x zer Thermometer Please note:It takes about a minute for the reaction over the temperature.