This 4CH AI BSD Alarm System will install 4CH vehicle cameras(front/right/left/reverse) and buzzer alarms(1-2pcs, max support 4pcs buzzers) and BSD monitor host. When the monitor realize and detect the pedestrians or vehicles entering the dangous zone, the buzzer will alarm via light and sound to outside human being(such as pedestrians,cyclists,car drivers,playing children etc), and the monitor host will alarm driver to reduce speed or stop driving.