Battery Brain Marine (Type III) 12V Don't ever get stranded because of a dead battery - this Battery Brain monitors your battery voltage automatically disconnecting the battery before it is completely drained Ensure your boat always starts - Battery Brain preserves enough charge to start your boat saving you downtime, inconvenience, and potential safety hazards Offers anti-theft feature with remote disconnection Fully draining a battery decreases its useful lifespan - the Battery Brain extends battery life in all seasons and all conditions Easily installs to any boat battery with multiple configuration options for every model and all of the necessary hardware is included for the mounting options, only tools required are wrench and screwdriver