BATTERY FREE DESIGN Mechanical thermometer reads instantly and without the need for battery powerSafe Temperature Zone and Warning Temperature ZoneIn our daily life, we often ignore the temperature of the refrigerator. For example, the high temperature in freezer is easy to make meat bad and if the temperature is too low, the fruits and vegetables will froze out. It will result in food waste if the temperature is not monitored in time.Blue and purple safe temperature zone indicators ensure food is kept at the proper temperature range, red temperature zone indicators warn us the temperature in the refrigerator is not good for keeping food. There are totally four temperature zones on dial: Freeze, Freezing, Fresh-keeping and Warm.The dial reads in both Fahrenheit and Celsius. From -20°F to 80°F (From -30°C to 30°C).High Quality Thermometer and Clear DialMade of premium steel which has passed the internationalcertification of food safety, non-toxic and use safety. With the features of corrosion resistant, tough and rust resistant, it can be used in fridge for a long time.When glass meets low temperature, it may freeze on the surface and cause reading obstacles. Gently wipe the ice with your fingers and you will see the temperature clearly. Clearly dial and red indicator makes it easy to read.Seven Holes Design on BackThe internal mechanical structure in thermometer can quickly feel the temperature changes in the refrigeratoConvenient Design of ThermometerThe unique thermometer design of wide base and integrated hook allow it can be hung from a rack or stand on its own. It can be placed in the most obvious place in the refrigerator, which is more convenient to monitor the temperature in refrigerator anytime and anywhere.Package Included:2 Pcs Refrigerator-Freezer Thermometer