Sierra Battery Isolator

Dimensions: 6 1/2'' W x 4 1/2'' D x 3 1/2'' H
Batteries: 3
Alternators: 1
Terminals: 4 -- 3/8-16
Max Output: 120 Amp
*Will not work with Delco ''CS'' style alternators
Negative Ground
Insures battery isolation without needing to check a switch
Allows 2 or 3 batteries to be charged at once