【Two Wireless Sensors】This smart thermometer controls the main unit and 2 wireless sensors are included, they can be used in different places of the refrigerator and also as indoor and outdoor thermometers. In addition, the room temperature and the temperature monitored by the 2 sensors (refrigerator/outdoor) can be displayed at the same time on the main unit. 【Accurate Measurement】The main unit of the home thermometer has a large LCD screen that displays both the main unit and the temperature monitored by the sensors. Temperature range: indoor (-10℃~60℃/14℉~140℉), outdoor (-40℃~60℃/-40℉~140℉). Accuracy up to ±1℃/±2℉. Transmission Range: 100 meters (open area) 【Alarm Reminder & MAX/MIN Record】 This wireless refrigerator thermometer has an audible alarm function. You can manually set the maximum and minimum alarm values. The audible alarm will sound when the temperature value reaches the preset limit of the maximum or minimum alarm value. The max/min record provides a temperature