I have a 2-he acquired Set Mole Schreck 2014 and am very disappointed in the effect. After a week of use came the mole next to the device from the earth. As can be no question of deterrence. All I can say bad about the money. Also, I've found in other devices with beep that the mole gradually accustomed to the same tone. It Währe not bad if you could change the beep after a certain time. So he can get used to the same sound bad.