The son-aux is a current sensing device that will automatically interrupt the audio lines going to the radio (and switch in an external rca signal)whenever audio signal is detected on its rca input the son-aux audio lines will. This interface can be use with any AXILIARY AUDIO INPUT interface to add a second aux input to your factory radio
also works to interrup audio from any factory cd changer son-aux with audio sensing this interface can be use with any of our aux auxiliary audio input interface to add a second aux input to your factory radio your radio needs to have the aux input or you will need the auxiliary audio adapter for your car stereo this can be use for any portable audio source ipod iPhone mp3 satellite radio xm sirius dvd
