This car thermometer is constructed with durable material that features direction display in cardinal points as well as in numeric digits. It includes an LED indicator that flashes light and warns about the icy road conditions. This facilitates easy-to-set auto calibration. The display is remarkably easy to read and records Minimum and Maximum temperatures for both indoor and outdoor thermometers.                                    Features            Time display<br>Alarm and snooze<br>Indoor and outdoor thermometer<br>12/24 hours format<br>Display C with just a press on the key<br>Min and max temperature record<br>Powered by DC 12V input (plug included) or by 2 AG13 button batteries (included)<br>Back light powered by car's cigarette lighter<br>Switch between blue or orange back light<br>Size: 3.57" x 1.59" x 0.87"<br>Car plug cable length: 56"<br>                                                                                                Package Includes            1 x Digital Thermometer with Alarm with Clock<br>