On my 2015 Excursion there is a rear camera mike so I can hear what my CEO is telling me about backing, or anything else for that matter. But I can't talk to her which it just the way she wants it. What sounds like static is actually wind noise. When there is little or no wind I don't get the noise. I also turn that backup camera mike down as low as it will go to reduce wind noise. That volume control is on the monitor. We then communicate with hand gestures.