Wireless Sensors for Different Locations - With built-in stand and 2 remote sensors, you can place the sensor in the refrigerator or outdoors. The wireless refrigerator thermometer can display indoor temperature and 2 groups of fridge/freezer or outdoor temperature simultaneously, meaning the display shows 3 temperatures at the same time. Audible Alarm Function - Equipped with an audible alarm, when the temperature exceeds the preset minimum and maximum alarm value, the thermometer will give an audible alarm to remind you and your family of temperature variations and make timely changes. 3.6 inch HD Large Screen & Record Min and Max - Indoor outdoor thermometer with HD LCD screen. Large data for convenient viewing day and night. Record and display max/min temperature. Interior: -10-60C; Exterior: -40-60C; Transmission range: 30M/98.4ft (open area). Press the \"C/F\" button to switch Fahrenheit or Celsius. Battery Powered & Intimate Service - Main unit requires 2*AAA (not included), 9.5*8*2cm; Each sensor 2*AAA (not included), 10.5*3.5*1.5cm. Easy Installation & Wide Application - You can place the sensor in the refrigerator or outdoors. On the main unit there is a hanging hole and a stand on the back, you can hang it on the wall or place it on the table.