and that is a much poorer backup camera than the large display in my dash that adjusts for dim lighting and shows a wider angle than I can see by twisting around to look out the back. The backup camera is safer than a back window in this scenario.
Sorry for the Amazon link, but I haven't had enough coffee to Google better: https://www.amazon.com/AUTO-VOX-T2-Monitor-Waterproof-Revers...
The videos in the reviews do a better job than the actual product videos of showing what is going on.
I feel that a good backup camera system gives you a better view of a wider area than just using the standard rearview mirror or than turning around and looking out the back of the car.