Best Kit BAA3637 Aftermarket FM Modulation Antenna Adapter for Nissan/Suzuki Vehicles 2005-Up Universal FM stereo modulator FM modulator with signal sense turn on Used to connect an FM modulator to the factory radio system Can also be used for anything that is needed to put a connection between the radio and factory antenna that requires the standard Motorola type antenna connection This adapter will split the FM signal between the factory radio in select 1999-Up Volvo and the FM modulated device