INNOVA 3340 Automotive Digital Multimeter (10 MegOhm/UL) Professional Automotive Multimeter designed to help pinpoint engine problems - UL Certified Product Tests alternator diodes, duty cycle, solenoids, breaker points, wiring, switches, and more Temperature probe, inductive RPM clamp and carrying case included Features auto-ranging, auto shut-off and over-load protection Includes test lead holders for hands-free protection