Attwood Tsunami Mk2 T500 Aerator - 12V - 90-Degree Inlet [5644-4] Brand_Raritan The MultiPlus takes over the

The MultiPlus takes over the supply to the connected loads in the event of a grid failure or when shore/generator power is disconnected

and indeed

Voltage: 12/24

and in various other applications

Attwood Tsunami Mk2 T500 Aerator - 12V - 90-Degree Inlet [5644-4] Brand_Raritan The MultiPlus takes over theTsunami Mk2 T500 Aerator 12V 90 Degree Inlet Keep bait and fish alive with the Tsunami Aerator Mk2. Attwoods leading fish friendly technology is making it easier to install and service while offering new installation options never provided by the Tsunami range. Features: 3 1 2 in. x 3 4 in. thru hull Flexible installation with both 90 and straight inlets and outlets Full backward compatibility with previous Tsunami models Faster, smarter installation