Feature two advance curve families that are adjustable to accommodate stock and modified engines Selectable multi-spark mode for quick starting and smooth cruising Unit has four rotary switches for timing adjustments, single/dual ignition mode and rpm limit (100 rpm steps) Coil outputs protected against short circuits Requires coils with a minimum of 3 ohms resistance and low resistance spiral-core type plug wires Uses the tachometer wire for the PC-link and comes with a connector Optional USB interface and software available for programming custom curves (programs available at daytona-twintec. com/index. html) 12V power adapter is used to power up the ignition system when removed from the bike and for installing new maps (sold separately) Made in the USA.