These Prosport USA high quality electronic gauges measure 52mm (2″) in diameter and come complete with sensors, wiring, instructions and gauge holder. They feature: * Modern black face which illuminates either white or amber when on (switchable colour). * Swiss stepper motor mechanism for smooth and accurate readings. * Adjustable warning feature to alert the driver of potential problems * Warning alert by both sound and light (programmable) * Ability to add optional additional external warning light * Peak recall ability to allow the user to check peak value reached in any given run. * Opening ceremony and self-test automatically performed when ignition is powered on. <p>Check them out on Youtube! <a href=”http://youtu.be/DXX0J7HfwZg=”_blank”>Prosport Premium Series Gauges Demo</a>.</p>