THanks everyone for your replies and insights. THe unit is definitely not household, as it appears to be either 6 or 12 volts max. I'm inclined to agree with the "boat" idea, only because I can't see how it would fit on a car and still be manually switched. It could also have been a gift of some sort. More questions than answers at this point I'm afraid. As for pictures, I have none, but the next thing I'll do is forward this web site on to the people who sent the query to me and let them take it from there. Thanks again for your kind assistance, - Old car people are the best! ~Brian