Traditional incandescent lighting illuminates around the perimeter of the dial

12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system

Gauge kit includes bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation Auto Meter's race proven air-core electric tachometers provide quick and accurate readings with a needle so responsive it can go from 0 - full scale in 333 milliseconds Triage engine health and setup changes using Peak RPM Memory recall with one touch review. Commonly referred to as the 'tattle tale' in the racing world, this function allows racers to gain quick insights between rounds about wheel spin, gearing and gear changes.