Guest 2501 Battery Isolator 70 Amp 2 Batteries 1 Alternator

Connect engine alternator to two batteries or battery banks for independent battery charging.
Isolates batteries and prevents a higher charged battery from discharging into a lower charged battery.
Automatically charges the batteries when the engine is running.

Features:
solid state design
Rubber wire caps
Marine grade construction
12 volt operation
One year warranty