A few years ago, I didn’t know anything about cameras fpr cars. And even if I heard something, I cannot recall it now. Nevertheless, such cameras became really popular. Lots of my friends have either installed one in a car, or purchased a car with already installed camera. On the internet there are plenty of discussions where people keep on discussing various questions on the cameras, for instance: which one they should choose, is it smart to buy it, how to install them, etc.