wireless sensors for different locations With built-in console and 2 remote sensors, you can place sensors in the refrigerator or outside. Wireless refrigerator thermometer can simultaneously display indoor temperature and 2 groups of refrigerator/freezer or outdoor temperature, this means the screen will display 3 temperatures at the same time. Audible alarm function Equipped with an audio alarm, when the temperature exceeds the preset minimum and maximum alarm value, the thermometer will alarm to remind you and your family to know the temperature variations and make some changes in time. record min and max outdoor indoor thermometer with LCD screen. Large data size for viewing day and night. Record and display max/min temperature. Interior: -10-60C; Exterior: -40-60C; Transmission range: 30M / 98.4ft (open area). Press "/" button to switch to Fahrenheit or Celsius Battery powered Main unit requires 2*AAA (not included), 9.5*8*2cm; Each sensor 2 * AAA (not included), 10.5 * 3.5 * 1.5 cm. You can place the sensor in the refrigerator or outdoors. On the main unit there is a hole for hanging and a stand on the back, you can hang it on the wall or stand on the table.