Feature two advance curve families that are adjustable to accommodate stock and modified enginesSelectable multi-spark mode for quick starting and smooth cruisingFour rotary switches for timing adjustments, single/dual ignition mode and rpm limit (100-rpm steps)Coil outputs protected against short circuitsRequire coils with a minimum of 3 ohms resistance and low resistance spiral-core-type plug wiresUse the tachometer wire for the PC link and comes with a connectorMade in the U.S.A.