&pi; Universal Car Tachometer Gauge 2"/52mm Led Digital Meter Series:Volt,Water Temp,Oil Temp,Oil Press,Tachometer ,Vaccum,Boost,Exhaust Gas Temp,Air Fuel Ratio Universal Car 2"/52mm diameter Tachometer Gauge DC(10-15v) Professional 12V IGN MAX 0.3A IGN MAX 0.3A LED super white display Professional installation is Highly Recommended.