If you want to use it on 12vdc you will need supply your own car to 110vac converter. you can buy them at most large chain retail stores. If you buy cheap ones online for under 15 dollars they sometimes do not work well.
This is for one piece of smart film that is 7" X 4" inches it works off 60 volts. this kit also includes a 110vac to 60v voltage converter.
it comes all wired up and ready to use