The door peep hole has been around since pretty much the dawn of, well, doors, and it really hasn’t changed all that much. And if your peep hole is anything like mine you can’t make the post man from a man with a post. The Peephole Viewer replaces your preexisting analog version and provide a crisp digital screen that even allows you to zoom in on your subjects. Installation just requires you to remove your existing peep hole, install a mount and soon you can see all your friends, or foes on its 2.5-inch LCD. It takes two AA batteries which are good for up to 1700 views and the screen will turn itself off after 10 seconds of inactivity.