7 user selectable colors (blue white red green cyan violet and yellow) to match visual preferences of driver and visibility conditions. Precision 280" brushless stepper motor movement provides a quiet fluid and accurate pointer movement with superior dial resolution and a self-calibration feature at startup.. 12 and 16 volt compatible compatible with nearly every street car or race car electrical system. Compatible with most 1-12 cylinder engines with 12v ignitions. Some applications may require a tachometer adapter sold separately.. Gauge kit includes mounting hardware and detailed instructions for installation. 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.