Features Metric And Imperial Scalings For Easily Relatable Readings w/o The Need For Mental Unit Conversions,w/ Points; Electronic And Most 12V High-Performance Racing Ignitions.,Air-Core Electric Tachometers Provide Quick And Accurate Readings It Can Go From 0-Full Scale In 333 Milliseconds,12 And 16 Volt Compatible; Compatible w/ Nearly Every Street Car Or Race Car Electrical System,Unique Three-Dimensional Dial Design Gives Added Depth And Style To Your Custom Dash,Modern White LED Through-The-Dial Lighting Provides Clear Visibility During Nighttime Use,Compatible w/ Most 4; 6; And 8 Cylinder Engines [2-4 Pulse Per Revolution Ignition Signals]