Features two advance curve families that are adjustable to accommodate stock and modified enginesSelectable multi-spark mode for quick starting and smooth cruisingFive rotary switches for mode select, timing adjustments, advance slope and rpm limit (in 100 rpm steps)Coil outputs protected against short circuitsRequires OEM coils with less than 1 ohm primary resistance and low-resistance spiral-core or carbon-core suppression-type plug wires12V power adapters are used to power up the modules when removed from the bike (sold separately)Optional USB interface and software available for programming (programs available on web site www.daytona-twintec.com/index.html) custom curvesEasy-to-follow instructions includedMade in the U.S.A.NOTE: Will not work on fuel-injected models.NOTE: Standard not legal for sale or use on pollution-controlled vehicles.NOTE: A.R.B. E.O. No. D-641-1.