Rearview mirrors have been a fundamental piece of motor vehicle equipment for more than a century. But as useful as mirrors are, they have a couple of significant drawbacks: They don't help you see what's directly behind your car below the level of the rear window, and they don't provide a wide-angle view.
Clearly, the most obvious benefit of a rear-facing camera is that it helps avert injury-causing and potentially fatal backover accidents by expanding your field of vision, particularly below the rear window or trunk level. Cameras also increase your ability to see beyond the width of a mirror's image, helping to eliminate blind spots. But in addition to helping protect people and property behind a vehicle, cameras have a number of other benefits as well.
For example, backup cameras can help you park more quickly and safely. Rear-facing cameras give the driver a much clearer and more accurate view of obstacles behind the car, and most backup systems include a warning tone that lets you know when you're getting too close to an object.