[Function] The refrigerator thermometer has 24-hour minimum and maximum temperature records, which can easily monitor the temperature changes of the refrigerator and provide double protection for food safety. 【Alarm】 Wireless digital display monitor with audio alarm function. When the temperature exceeds the preset minimum and maximum digital settings, an audible alarm will sound to remind you to check and set the time. 【Adjustable】 The minimum and maximum temperatures are displayed on the LED screen, and you can manually reset the setting numbers. The screen has an adjustable hook on the back so it can be mounted on a wall or erected on a table. [Purpose] The display screen has temperature trend indicator arrows and daily temperature information. Not only can be used as a refrigerator/freezer thermometer, but also as an indoor and outdoor thermometer. [Note] The digital thermometer updates the temperature data every 10 seconds. Indoor temperature range: 0℃~50℃ (32°F~122°F), outdoor