Two Wireless SensorsThis connected 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. Besides, the room temperature and the temperature monitored by the 2 sensors (refrigerator/outdoor) can be displayed on the main unit at the same time. Accurate measurementThe main unit of the household thermometer is Featuring 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) Remind Alarm and MAX/MIN RecordThis wireless fridge thermometer has sound 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. Max/min record provides temperature history for the