Polished stainless steel fridge / freezer thermometer with large easy-to-read dial and colour-coded temperature markings Enjoy the peace of mind that your food is stored at a safe temperature. Great for fridges and freezers without built-in thermometers Easy to install with no wires - simply hook onto a shelving rail or place in the fridge Measures between -30 and 30 degrees Celsius (-20 and 80 degrees Fahrenheit), Five year guarantee