The #710 by Electronic Specialists performs variable load testing on 12 volt batteries rated as high as 1000 Cold Cranking Amps. The #710 features large dual meters to display the battery voltage and load current simultaneously, during the test. The carbon pile load current is completely adjustable from 0 to 500 Amps, to match the size and rating of the test battery. The unit features an audible tone indicating the end of the 15 second test. The dual meters are color coded for simple pass/fail test results.