The SV-900.CSB is a multi-camera switcher that gives you (4) video inputs and (1) video output. This system also comes with a remote to switch between the different inputs. This also offers a reverse, left or right inputs to allow them to switch automatically. The fourth input is for the front camera and that is on whenever the ignition is on or when one of the other triggers are activated.
The SV-900.CSB is a multi-camera switcher that gives you (4) video inputs and (1) video output. All of the inputs have their own trigger (reverse, left, right, ignition) with the front (ignition) being on whenever none of the other triggers are active. Each one of the inputs also offers a trigger input and output.
What this will allow you to do is supply the camera with power when it is triggered either by the included remote or by whatever means that you connect the trigger input wire to. Generally the left and right inputs are connected to the left and right turn signals and the reverse is connected to the reverse light trigger. No matter what camera you are viewing, when you place the vehicle into reverse it will show that image. The included wired remote offers a sliding cover so that the buttons do not get pushed on accident.