Kit includes ignition module, single-fire coil, 8.5mm 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.NOTE: California A.R.B. E.O. #D-641-1.