McKesson Digital Refrigerator / Freezer Thermometer with Alarm (1175429_BX) 1/BXWireless refrigerator freezer thermometer comes with a triple LCD display with large digits and single probe. Thermometer monitors refrigerators and freezers up to 30 feet away with wireless temperature sensor (164 foot open field 32 foot distance for inside fridge wireless). Triple display shows current, minimum and maximum temperatures. Programmable low and high alarm limit. Three channels temperature measurement: Internal devices with ambient