The Cobra 15-Band Radar Laser Detector with Digiview Display can detect all 15 radar/laser bands quickly and accurately. The ExtremeBright DataGrafix display helps you read the data in easy-to-see vivid colors. From the five different color schemes available, you can select one that matches your dashboards illumination. There is also a dim mode, which allows you to dim the display for better night driving visibility. The system-ready prompt conducts a self-test and notifies you when it is ready to use. This radar laser detector also detects the low voltage of your cars battery and alerts you when it is below 11.9 volts. With safety alert transmitters, this detector also alerts you of the nearing emergency vehicles or railroad crossing. This digital compass radar also comes with EasySet programming menu options - a Stay-Set electronic memory and an electronic compass for easy operation and accurate detection.