Mounts on the outside of your refrigerator easy-to-view LCD display Digital thermometer a water-resistant sensor probe Has (2) two alarm settings: high and low temp alarm Features a audible alarm Offers (3) three mounting options: magnet, key hole or flip down stand Reads room and refrigerator temp Measures temperature from -58° to 158°F (-50° to 70°C, Accuracy: +/- 2° F (+/- 1° C) Accurately monitors temperatures in refrigerators, freezers, and incubators Comes with a 58" long detachable wire sensor Battery: 1.5 volt AAA battery(NOT INCLUDED) This digital thermometer features a water-resistant wire sensor probe and an LCD screen with readouts in Fahrenheit or Celsius. Quickly and accurately monitor the temperature of your refrigerators, freezers, incubators, terrariums, and small pet habitats. You can also detach the wire sensor from the thermometer, giving you a small easy-to-view digital thermometer. It?s made with an attractive stainless steel finish and a single display with the ability to switch between room and refrigerator/freezer temperatures. It has a maximum/minimum temperature memory, two alarm settings (high/low temp alert) and features a visual/audible alarm. The alarm feature provides an alert when the temperature rises above or falls below a set point. Alarm is programmable in 1° increments. The 58" (4'8") micro-cable sensor offers a solid-state probe, permitting doors to close on it.