I'm not sure how it works, but it seems to me that you have to stick mark the target with a laser first...can do that around a corner with a cell phone or similar, but would be really difficult on a small screen to capture the target, especially if moving, by holding a rifle up over a wall while watching a cell phone type screen...ever try to shoot over your shoulder with a mirror...same type of idea. Nevertheless, better than a bullet between the eyes!
