Helpful to ReadThis Refrigerator Thermometer Features Easy-to-Read Electronic LCD Display, You Can Know the Exact Temperature (Including Max/Min/Immediate Temperature) of Your Freezing Chamber at Any Time, Etc.Double Usage Temperature Range: -20C to 50C (-4F to 122F), Accuracy: 2F (1C); The refrigerator thermometer is equipped with min/max function, it not only can be used in refrigerator and freezer, but also can be used as a general thermometer for indoor and outdoor. Calig for conditioning or hanging this freezer thermometer Is Equipped With A Foldable Hook, Which Can Be Used For Display By Hanging It In The Fridge And Freezer Or Placing It Upright. Changeable C/F And Min/Max Recording This 3 Button Freezing Thermometer Is Simple use. Simply Press The On/Off Button To Turn The Thermometer On/Off. Press the C/F Button to Select Celsius or Fahrenheit, Once You Restart the Thermometer, the Max/Min Temperature Will Also Be Reset.Mini Waterproof DesignWaterproof Structure, IPX3 Level, Can Withstand the Humidity of the Refrigerator Or from the freezer, which is more durable and safer, and the mini design will not take up too much space in the kitchen.