Through the three bugeye-lenses high-definition infrared night-vision cameras installed at the back, at the right side and at the left side of the coach (truck), the images can be simultaneously displayed on the monitor inside the coach (truck) after the video signals of the three cameras are compressed. Meanwhile, the data of the videos are automatically saved so as to be checked upon request in the future. It is convenient for the driver to observe the blind areas while reversing. But more importantly is that the video of the process of a crash during the course of driving can be sufficient evidence to determine who should take responsibility for the accident. When designing the system,Guangzhou KETOO Electronics Co.,Ltd fully considers its compatibility and expandability, which offers the driver the alternative to further install cameras inside or at the front of the coach (truck) to perfect the monitoring.