The scene is fed back to the monitor by the camera through the optical cable, which is suitable for rescue work in limited space and inaccessible to rescue workers by conventional methods, such as feedback of trapped victims in limited space such as collapsed buildings, deep wells, mines, etc. and the accidents of distorted cars, airplanes, ships and trains and naked eyes. Unvisible places, sewer lines, mines and underground locations can be used to search for missing persons and can be used underwater at depths of up to 45 meters.
