? Ultra reliable dual fire electronic ignition system for all Harley-Davidson V-Twin engines except early magneto type? Includes special trigger rotor for use with traditional mechanical advance mechanism? Precise digitally set RPM limiter (200RPM) steps from 5,200 to 7,000 RPM)? Status LED for easy static timing? Electronic dwell control for maximum ignition energy at high RPM and reduced current draw at low RPM? Compatible with most original equipment and aftermarket dual fire ignition coils (3-5 ohms primary resistance)? Easy installation, simple two wire hookup to coil? Hall effect sensor detects teeth on special trigger rotor and provides very stable spark timing? Operates down to below 6 volts for reliable starting under all conditions, including kick start? Fully encapsulated construction using surface mount electronics? Waterproof and highly resistant to vibration and shock? Over temperature protection, rated to operate at 125° C (260° F)? Requires purchase of standard mechanical advance weight assembly to complete installation