I have ordered this device to keep the cats from my car - how to keep even strange dogs from the plot. So we have in the village namely a so-called "village-ass" - a seemingly schwerhöhrigen mongrel, which daily turns his rounds in the village and all zuscheißt. The looks just stupid as ever in the times where I did not have such a fright. The cats go on their rounds and in front of the "part" and also my Jack Russel Hybrid disturbs the device does not give a damn. As the device only reacts when moving anyway there and not when the "Kreppel" have put on the car. Since schlägts not to more, it's to recognize no "movement"! Me on the other hand and all my fellow human beings is the thing really on the mind! It FIPT quite disgusting that a drop ears. But this is not the point of it, so I can not call this electronic waste as valuable or useful!