Open vision, standardize pedestrian and vehicle, traffic order and other functions. Installed in the indoor dead corner of supermarkets, stores, shopping malls and other places can make the place within the monitoring range of the staff and play the role of anti-theft. Factory workshops, enterprises and institutions, and laboratories can regulate personnel to pay attention to safe passage and broaden their vision. The installation of this product in the underground parking lot can prevent vehicles from knowing the situation at the other end of the road in time before turning, and avoid collision with oncoming vehicles.