Features: This switcher is designed to add more video inputs for cameras when it's connected with video interface for different car models. Four video outputs share with one video channel with the same power trigger line. When each camera gets power supply from the corresponding car lamp, the display could show the correct video channel by turn on left and right indicator or back up. The product itself has designed the product power and the camera supply protection circuit, carries on the protection to the camera and the vehicle circuit. It adopts wireless remote control. Specification: Material: Plastic & Metal Color: Black Package Size: 15 * 10 * 4cm / 5.91 * 3.94 * 1.57in Package Weight: 132.1g / 4.66oz Package List: 1 * Video Switcher 1 * Remote Controller 1 * User Manual