The Associated Equipment Heavy Duty 12V Automatic Battery and 12/24V Electrical System Analyzer, No. 6044HD, is a 500A variable load tester that features an easy-to-read LED voltmeter and ammeter with 800A safety clamps with Flexi-Spring and patented side terminal adapters. The 6044HD provides automated testing for 12V and 24V electrical systems, and it can test alternators, starters, and all battery types. Ideal for testing remotely mounted batteries accurately. It offers maximum and minimum current and voltage readings and a microprocessor-based control board protected from reverse connections. It is made in the USA of U.S. and global components.