An affordable way of ensuring that your onboard entertainment remains juiced up, the Poly-Planar IC-3.5PM allows you to connect your MP3 player, iPod, or satellite radio to any watercraft's audio device equipped with RCA inputs. The adapter features a waterproof panel/dash mount with rubber cover and a 4' extension cable with RCA plugs. Also included is a 4' patch cord for connecting MP3 player to adapter plug. Dashboard/panel mount waterproof female 3.5mm stereo jack 4' extension cable with RCA plugs Rubber plug keeps water out when not in use Can be installed on panels up to 1.25 thick Easily installed with commonly available 3/4 paddle drill bit Can be used as remote headphone jack 4' 3.5mm to 3.5mm stereo headphone jack extension cord included