This 12 volt power outlet is the common "cigarette lighter" socket. From fans and lights to cell phones and iPod speakers, they power the electrical and electronic devices so many of us enjoy. It is very handy to have one or two in convenient locations aboard.
We like this unit because, being mostly plastic, there is very little to deteriorate. The only metal components are the electrical contacts themselves which are nickel plated for good electrical contact and resistance to rust and corrosion.