http://www.invisicord.com/index.html $15-25 for 6" of phone wire? It's just a phone cord! A normal, regular RJ11 phone plug and Y/G/R/B wires Red = 12V Green = Ground Wire that bitch up to your rear view mirror! Made my own today at work with one of the many phone cords laying around. Yay It's wicked awesome, even has it's own volt meter.