Ultra Precision, digital microprocessor technology and more accurate than old fashioned analog shift lights. Self Contained, no rpm activation modules or pills needed. No tach adapter needed for new Coil-on-Plug with multi-spark ignitions. Works on all ignition systems, excluding capacitive discharge (CDI). Fast and easy RPM setting with rotary dip switches x1000 RPM and x100 RPM. 1000-9900 RPM range adjustable in 100 RPM increments. The RPM range can be doubled to a maximum of 19,800 RPM by doubling the cylinder select switches for your vehicle and setting the RPM to 1/2 of the desired RPM activation point. Accomodates any size engine, requires 5 or 12 volt tach signal operation from ECM or coil. Features seven high intensity LEDS available in red, green, yellow or blue with black 6061-T6 aluminum housings or chrome housings.0.75 inch diameter x 3.125 inches long, 10 ft. cable – black jacket. NOTE: Please specify if ordering for 2010+ Camaro (requires special programming by Raptor before shipping).