Enjoy the peace of mind that your food is stored at a safe temperature. Save money by keeping food fresh for longer!. Easy to install with no wires - simply hook onto a rail, prop it up using its built-in stand, or attach with its magnetic back. Simple one-button operation. Temperature range of -19 to 50 degrees Celsius (-4 to 122 degrees Fahrenheit). Battery included - 5 year guarantee. MasterClass Digital Fridge Thermometer in Silver