The Maxi-Tune Ignition Analyzer is a diagnostic tool used to analyze and troubleshoot ignition systems in vehicles. It comes with an instruction manual to guide users through the testing and analysis process. This analyzer is designed to provide accurate and reliable readings to help identify and fix issues with the ignition system, ensuring optimal performance and efficiency for the vehicle. Perfect for auto mechanics and car enthusiasts looking to diagnose and fine-tune their vehicle's ignition system. This unit is untested.