1. The first thing you need to understand is the alarm function. When the test temperature exceeds the maximum or minimum temperature set by the thermometer, the thermometer will sound an alarm to remind you to adjust the temperature. 2. The display console shows the temperature, as well as the minimum and maximum temperatures, which can be manually reset. 3. The easy-to-read LCD display shows the current indoor/outdoor temperature. If the power is insufficient, it will be displayed on the LCD screen. 4. Includes 24-hour records of maximum and minimum temperatures. 5. With temperature trend indicator arrow and daily maximum and minimum information. Specifications: Description: The wireless refrigerator/freezer thermometer includes 1 built-in indoor temperature sensor in the console and 1 remote sensor, which can monitor the refrigerator temperature and indoor temperature. Continuous 24-hour recording of maximum and minimum temperatures inside and outside. Temperature trend arrows