Kit includes ignition module, single-fire coil, 8.5 mm spark plug wires and instructionsTwo advance curve families with adjustable advance curves to accommodate stock to wild engine modificationsUnit has four rotary switches for adjusting timing, single/dual fire, rpm limit and two LED indicator lightsDigitally set rpm limit (in 100 rpm steps); selectable single- or dual-fire modeSelectable multi-spark mode for quick starting and smooth cruisingCoil outputs protected against short circuitsOptional USB interface and software available (programs available on web site http://www.daytona-twintec.com/index.html) for programming custom curvesKit uses the tachometer wire for the PC-link and comes with a connectorMade in the U.S.A.