ALL THESE MODELS SHOWN MUTE YOUR CAR RADIO WHEN YOU RECIEVE A PHONE CALL. IT GIVES YOU THE OPTION TO TAKE THE PHONE CALL OR IGNORE IT.
IF YOU ACCEPT THE PHONE CALL, THE VOICE ON THE PHONE WILL PLAY THROUGH YOUR CAR SPEAKERS.
IF YOU IGNORE THE CALL, YOUR RADIO RESUMES PLAYING UPON YOU HITTING THE RED(IGNORE) BUTTON.