This device includes one or two video cameras and a recording system, all in one, as shown in the picture.
It can be attached to the windshield, with one camera facing the front and the other facing back, or both facing front or back.
As soon as the car moves, it will start taping. Video clips can be played and output to a TV. Useful clips can be archived and downloaded to the computer.

This device is normally given to the customer as a deal closer (with the cost included in the monthly fee or upfront charge).