The temperature range: -4°F to 122°F (-20°C to 50° C) Big Digits LCD Screen, Centigrade and Fahrenheit switch, easy to read. Magnetic back, stand and hook for hanging, easy to use. The MAX / MIN temperature provides crucial temperature readings for food safety applications. IPX3 Waterproof: Waterproof structure (waterproof level IPX3) can resist the damp of the refrigerator or freezer room, make sure it is working in a safe and consistent manner.