New Cobalt series features a black dial face, anodized bezel, white numbering and blue accents. Glowing red gauge pointer provides clear contrast and visibility. Uses LED technology. Features precision air-core movement engineered to provide extremely accurate readings under harsh conditions. Air core eliminates drive against bi-metal by utilizing magnetic fields for resistance free and exact operation. 10,000rpm tach operates on 4, 6, and 8 cylinder engines with standard, electronic and most high performance racing ignitions and 12V power.