LARGE INDICATOR: The refrigerator thermometer is large enough for providing a clear, easy and quick read, the dial displays proper temperature zones for refrigerator and freezer, ensuring a safe temperature zone for your food WATERPROOF DESIGN: Probe Waterproof level IPX3 can resist the damp of the refrigerator or freezer room, make sure it is working in a safe and consistent way SIMPLICITY & EASY OPERATE: Digital thermometer hygrometer, simplicity is the key, NO need to operate any buttons WIDELY TEMPERATURE MEAURING RANGE: The temperature can range from -50 degree to 110 degree and it is accurate. Allowing you to use this in the fridge, freezer. it can act the role of general thermometer for indoor or outdoor WIDELY APPLICATIONS: Perfect thermometer for fridge, freezer or as a general room thermometer. It is useful for different occasions such as home, restaurant, greenhouse, office Battery installation: Flip the rear of the product; push the direction indicated by battery cover Pl; two button batteries to the battery compartment Temperature optional sampling period of 2 seconds (default 2S) Operating voltage: 1.5V 2 button batteries Type: refrigerator thermometer Operating temperature: -5-50 Celsius (display) Humidity: 5% ~ 80% Colour:black Material:plastic Size:Line length: 2m Dimensions: 47.6 * 28.4 * 15.5 mm Embedded hole size: 44.3 * 25.3 mm Package Contents: 6*refrigerator thermometer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.