This 4" Diameter - White 7,000 rpm tachometer includes 4-Stroke monitor functions. Monitor functions include: Low Oil Pressure Warning, Engine Temperature Warning, Check Engine Warning and Over-Rev Limit Warning. Features include perimeter-lighted white dial with stylish blue and black graphics, polished stainless steel bezel, contoured black pointer and glass lens. Includes instructions and mounting hardware. Wire harness may be needed for Monitor Gauge connection.