Features: Ensure food freshness with the refrigerator thermometer. This digital fridge thermometer accurately measures indoor and outdoor temperatures, helping you adjust cooling settings accordingly. Designed with an external sensor, this thermometer is easy to install and provides convenient access to temperature readings. The display shows both indoor and outdoor temperatures, allowing for easy monitoring. Suitable for households, restaurants, and supermarkets, this thermometer is perfect for those who need precisecontrol over refrigeration temperatures. It is particularly useful for families with infants or elderly individuals. Whether placed inside or outside the fridge, this thermometer provides a clear and visible temperature display on the screen. It helps users store their food properly and prevents spoilage. With its easy installation and durable ABS material, this thermometer set offer convenience and peace of mind for all your temperature monitoring needs. Specifications: Material:ABS Host size: 110x45x85mm/4.33x1.77x3.34inch Subunit size: 38x20x105mm/1.49x0.78x4.13inch Model:ZNS019/ZNS020 Color:White Indoor temperature range: 0°C~+60°C Outdoor temperature range:-40°C~+60°C Power supply (host): 2x7 battery Power supply (sub-unit): 2x5 battery Wireless range: 100meters without interference Package Includes: 1 Set Digital Refrigerator Thermometer note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.