The device audibly warns pedestrians and other persons in the vicinity that the vehicle is reversing. Mainly used for distribution and municipal vehicles moving in pedestrian and residential areas, or for forklift trucks moving indoors. When reverse gear is engaged in the vehicle, the reversing siren signals with an acoustically intermittent tone. Easy installation in parallel with the reversing lamp or via a reversing switch. For use in densely populated areas, we recommend a model with the so-called "WHITE SOUND" with a low tone stands out among the high sounds of other signals. In some countries, the use of a low tone is even mandatory to signal reversing.