Autometer Rose To Become The Most Respected Name In Professional Instrumentation On The Back Of Its Highly Advanced And Precise Tachometers. Taking Our Traditional Analog Tach Circuit Into The Digital World Provides You An Easy To Read Display Of Your Exact Engine Rpm. Since 1957, Autometer Has Been At The Absolute Forefront Of Tachometer Technology, Providing The Most Accurate, Quickest Responding Tachs In The World. Easily Configurable For 1-12 Cylinder Applications. Built In Shift Light Controls For Use With Any Autometer Shift Light.