The devices have a relatively unstable housing that we must tap into the ground under any circumstances. Therefore, they are a few centimeters above the surface (which is probably also thought so). However, this has the result that the sound is audible throughout the garden and the neighborhood feels disturbed. I then dug three devices in lawn completely. The buzz is now practically hear only up to one meter. Our mole can not be impressed by the devices. He has now built only 20 cm beside a Wühlmausschreck the latest pile. The well must be hard of hearing. The rescue against a mole Plage, these devices are not in any case.
