** PLUGS DIRECTLY INTO CARS OEM ANTENNA SOCKET AND THEN INTO THE NEW (AFTERMARKET) STEREO ** Plug N Play connection ** Allows AM/FM Radio to still work w/ After market Antenna ** Connects to any aftermarket receiver . Designed for a CENTURY 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999