Tests alternator diodes, duty cycle, solenoids, breaker points, wiring, switches, and more. Min/Max and Hold buttons save retrieved data. Unit provides hands-free testing and includes test lead holders. Rugged corner guards provide drop protection. Features: * Pro quality features help pinpoint engine problems * Auto-Ranging, auto shut-off, over-load protection with a 10 MegOhm impedance prevents damage to ECU * Tests alternator diodes, duty cycle, solenoids, breaker points, wiring, switches, and more * Automatic zero adjustment, reverse polarity protection * Monitors vehicle RPM (including Coil On Plug vehicles) What"s In The Box: * Equus 3340 Innova Pro Automotive Digital Multimeter