36-INCH EXTENSION CABLE - to allow for customizing the installation of any SoundExtreme LEDCast vehicle LED accessory light kit (not compatible with any other generic brand LED accessory light kit) WATERPROOF - the O-ring seal keeps the connections water tight and built for the elements MULTIPLE OPTIONS AVAILABLE - other lengths include 6-inch, 12-inch, 18-inch, 56-inch, 72-inch, 96-inch, and Y-Connector (sold separately) LED interconnect extension cable to allow for customizing the installation of any SoundExtreme LEDCast vehicle LED accessory light kit. These cables are built for the elements because the O-ring seal makes the connections tight and waterproof