The device generates an acoustic signal with a frequency of 23 kHz at intervals of 15 seconds on and off-time. This ultra-high frequency is perceived by the martens as disturbing and unpleasant, so that they can avoid the corresponding vehicle. People do not hear the sound and do not feel disturbed by it. The integrated quartz technology ensures a constant interval duration and stable frequency emission. The rodent repellent is connected directly to the battery of the vehicle.Martens are nocturnal animals and are flexible in the food intake. Houses, barns in towns and villages and warm places such as garage or motor rooms are among the preferred places of residence of martens where they cause considerable damage.If you have a rodent on the attic at home, the night quickly becomes the day, the rodents scratch and untie everything that wasn't firmly anchored. Flower pots are emptied and thrown over and the chickens are no longer safe.Especially in cities where house by house is built and