The INNOVA 3568 Digital Timing Light is a top-of-the line timing light with a precise split-screen digital LCD readout that displays tachometer and advance functions simultaneously. This also includes a slim, rotating barrel for better aim at timing mark and works with most ignition systems: conventional, electronic, and computer-controlled systems - domestic and import. The INNOVA 3568 also has a Patented Skip Circuitry Test up to 9,990 RPM.