I backed into something. I have never backed into anything before in my life. I am thinking maybe because it is hard to see something low setting in back of an Element. I am looking for a back-up sensor that just beeps. I don't need the camera to see whats back there. I found one at Walmart for $30 but it needs to be wired. Anyone know of and where I could get an inexpensive wireless back-up sensor that just beeps?