Also, to increase the safety shield to prevent vandalism, many protective cast is also equipped with tamper switch, once the protective cover is opened the alarm signal. 
 Monitoring system in a wide variety of protective cover, and can be divided into a rectangular shape in accordance with their shields, wall or ceiling with shields, ball guard, corner guard, slope-shaped shields and so on. 
 Shield selection method 
 Shield used to protect cameras and lenses, divided into indoor and outdoor. Select the protective cover should pay attention to: 1) According to the installation location, the correct choice of indoor or outdoor enclosure. Indoor enclosure main role is to dust, while the outdoor enclosure in addition to dust, the more important role is to protect the camera in a variety of harsh natural environment (rain, snow, cold, heat, etc.) work properly.