The kits include a one camera suzie cable and the suzie cable consists of three parts.  The 10m cable runs from the monitor to the back hitch of the car connecting with the spring part of the suzie cable. The 15m cable runs from the spring connection to the camera on the back of the caravan. The spring section is the part that is unplugged when not towing the caravan.  The two monitor styles support either two cameras or three cameras and additional cameras and cable can be added to the kits by clicking on the TAB "Add Extra Camera(s)". The additional camera is usually installed at the rear of the vehicle for backing up to the caravan and/or using the camera as a rear-view camera when not towing the caravan.