Dimensions: 8'' W x 4 1/2'' D x 3 1/2'' H| | Batteries: 2| | Alternators: 1| | Terminals: 3 -- 3/8-16| | Max Output: 165 Amp| | Negative Ground| | Insures battery isolation without needing to check a switch| | Will not work with Delco "CS" series alternators