The Sun Electric 1015 Engine Analyzer Tune up Tester with MAG-81 is a great tool to help you diagnose any issues in your car. The analyzer can help you test the electrical, mechanical, and fuel systems of a car. It has no warranty and is made by Sun. The brand is known to be reliable in the automotive industry. The analyzer has a custom bundle that includes the MAG-81. This analyzer has not been modified. It is a great tool to have in your automotive toolbox.