The Unni Fridge Freezer Alarm Refrigerator Thermometer (UN0583) is a portable weather station that measures temperature and humidity in both Celsius and Fahrenheit. It is powered by batteries and features a wireless design for convenience. Made of plastic in a silver color, this medium-sized unit is compact with dimensions of 5.25 inches in length, 5.5 inches in height, and 3 inches in width. With a weight of 8 oz, this thermometer is ideal for monitoring the temperature and humidity levels in your refrigerator or freezer to ensure optimal storage conditions for your food items.