vintage RAC Maxi-Tune ignition analyzer. It is used for automotive diagnostics, specifically for engine tune-ups. Functions include measuring Amps, Volts, Dwell, and RPM (both high and low settings). It is designed for use with 4, 6, and 8-cylinder engines. These analog tools were popular in the 1980s and 1990s for setting up older, carbureted cars.
