The illustration above is an example on how to mount your camera and monitor. Due to the length of the camera power cable, the camera should be placed at a maximum of 3 meters of a suitable power source. The power source is often the trailer light source. The monitor power cable is 3 m long.
At a free line of sight the range between the camera and monitor is up to 150m. However, all vehicles are different so please try out the signal quality before mounting the items permanently.
The 2,4 GHz frequency signals are sent as radio waves in the air. The waves can penetrate most objects or bounce around them. However, the signals loose strength at every obstacle (windows, walls etc.) they need to penetrate. If trying to penetrate metal, the signal strength will be substantially reduced.