Feature:1. Can be used for large trucks, cars, CMB & other vehicles, through this converter, can connect 2 cameras, such as front & rear, or left & right, through the remote control switch, & then reversing the blind zone, one-button remote control Switch the blind zone camera arbitrarily.2. The obstacles are obvious when the vehicle is reversed, the installation is simple & convenient, the yellow andblack sides are the camera connection port, the other side is the black connection car display AV, the red is the power line, and the mini button remote control can be attached to the car interior.3. This switch, can be used in any vehicle, or camera, attention interface must be BMW 4-pin interface. Specification: Material ABSInput 12-24 V Power 0.2 WWeight 90g Size (L x W x H) 5.50 x 4.00 x 1.00 cm / 2.17 x 1.57 x 0.39 inches Package Included:1 X Camera Switcher