Actrons AutoTroubleShooter professional level meter is a highly versatile tool that performs all standard and automotive specific electrical tests for on-car and on-bench troubleshooting, including: tach, dwell, volts, ohms, and diode tests on both 6V and 12V systems. Perfect for testing starting and charging systems, ignition and fuel delivery systems, and helps locate faulty wiring and components. The extra-large, easy-to-read digital LCD display features an on-screen test leads connection reminder, automatic reverse polarity indication, and low battery indicator. UL and ETL listed tool has automatic zero adjust, overload protection on all ranges, 10 MΩ impedance, is switchable between 4, 6, 8 cylinder modes, and hold button to retain display data. Includes: protective boot, fold-out stand, detachable color-coded test leads, alligator clips, quick start guide, and detailed downloadable instructions with test procedures, diagrams and more in English, Spanish, and French. Requires one 9V battery (not included).