NEW Never Used. The innovative Pro-Timing Light Advance (PL2A) identifies the exact ignition timing point instantly and accurately. The Innova 5568 Pro-Timing Light Advance is an economical timing light for professional and do-it-yourself use that replaces the 55610 and 55620. This timing light has a larger, easier to read pocket watch style dial and the auto shutoff feature makes it turn off after 10 minutes of non-use. Professional timing light for all domestic and international vehicles. Identical to the light used by GM dealers for timing, this advanced timing light is able to advance and retard timing through the tuning software program, which is included. The 5568 is Equus Products' premier timing light. This light includes a built-in tool case/stand for convenient storage and ease of use. The patented design includes a bulb that exits the rear of the timing light, for easy attachment to any vehicle. The new durable pro/timing mode light gives off the correct advance curve for all fuel types including: gasoline, methanol, E85, and CNG (Compressed Natural Gas) The Innova 5568 is a professional timing light that offers a digital timer for easy and precise advance timing. The timer accurate to ± 1% will hold a maximum of 10 minutes in the memory. The light can operate on either AC or DC power, and has an integrated temperature sensor that can be used to check engine oil temperature. The Innova 5568 is a professional shop tool with a sturdy construction for long-lasting durability, and features that make it ideal for tuning your vehicle. The INNOVA 5568 is the best timing light on the market and this new version is even better! It features a 175 degree timing light beam, adjustable beam width, no dead spots in the shadows, LED display for ease of use, fast trigger speed (5 nanoseconds), special 3 wire connection. It is completely weatherproof with a metal casing. It also works with every sensor we have ever made including our new AirFuel E5 wideband sensors. INNOVA 5568 Pro-Timing Light with Tool Case has 3 ways to set timing: