What all does a back up camera do?

I'm looking to buy a new honda accord with a back up camera. I asked which trims have the touch screen radio, he said the EX and up (through emaiI) I looked at the LX and it has the back up screen… Wouldn't that be used for the radio as well? We have a Acadia and the back up uses the radio

All Honda Accords from 2013 on have an i-mid… An intelligent multi information display. Which is the 8-inch screen at the top middle of the dashboard. This is a non-touch screen that displays the backup camera, as well as audio, text messages, climate control, fuel economy, and navigation information.

The EX and higher models have the touch screen radio. Which is a small (I believe 5 or 6 inch) screen between the i-mid and the climate controls. This is just for controlling the audio functions… It does not display the backup camera. The audio information can still be displayed on the i-mid, but disappears once reverse is selected.

Some cars have a backup screen in the rearview mirror, call a dealer and ask the salesman

In the Honda it is viewed through the rear view mirror once the reverse is selected it activates on the rear view and a small video appears inside the mirror.

What does it do? It photographs your rear end and broadcasts it on the internet.