Dual Wireless Sensor For Different Places - built-in the console and 2 remote sensors, the wireless fridge thermometer can display indoor temperature and 2 groups of fridge /freezer or outdoor temperature simultaneously. Max/Min Record & / Switchable - the Oria Freezer Thermometer can record max/min temperature and display up, down & parallel arrow to indicate the trend of current temperature; Press / key for switching Fahrenheit or Celsius. Audio Alarm For Reminding - the wireless refrigerator thermometer equipped with audible alarm, when the temperature exceed your pre-set minimum and maximum alarm value, the thermometer will make audio alarm to remind you and your family to know the temperature variation and make some changes in time. Multiple Installation Ways - with integrated magnets, a hanging hole and a bracket at the back, the wireless thermometer is easy to install. You can attach the main unit on your refrigerator door, hang on the wall or stand on the table. 2 transmitters with clamps and suspended holes in the rear, convenient to clip or hang on the shelf. OPERATE EASILY - there are 6 function keys on the main unit and signal indicator on the transmitter, you just press the corresponding key to operate the main unit. Temperature range: Indoor -10~ 60 (14~ 140), Outdoor -40~ 60 (-40~140) and the transmission range is 100M/328ft(open area). Please contact us if any problem about the item and our service, we will try our best to resolve the problem.