Traditional incandescent lighting illuminates around the perimeter of the dial. Includes data acquisition grade solid-state MAP Sensor providing unmatched accuracy and durability even in the harshest environments. Gauge kit includes MAP Sensor T-Fitting nylon tubing vacuum fittings wiring harness bulb and socket assembly red and green bulb covers mounting hardware and detailed instructions for installation. Acquire data for later review with one-touch Peak Recall functionality. Set a custom alert specific to your vehicle &. receive warning notification to highlight the need for driver attention. 12 and 16 volt compatible compatible with nearly every street car or race car electrical system. Autometers Race Proven Digital Stepper Motor Electric Instruments Provide Unmatched Accuracy Which Is Further Increased By Utilizing A Self Calibration Sequence During Power Up