After the first fitting in the ground, the Mole was very unimpressed. He dug himself even further in the direction of Hum. In my mind, the mole was comfortably below the unit and was massaged by the vibration. I followed the advice in the reviews and dug a little deeper parts of a rod so really completely in the earth disappeared. The mole then shifted his hill in a little further entfernes area. I have a share in the then new residential area of Maulwurfes added. A few desperate hills around the pond were the last thing I saw. Now for two weeks rest is * * knock on wood I find the device as not disturbing at all. Even my guests they do not notice even though an approximately 5 M Shet away from the terrace. The dog it also disturbs even nicth. He romps around cheerfully between the whirring parts.