Who buys this equipment does know one thing: The unit works with sounds that it emits approximately every 10 seconds. Mind you: It's not that these people are inaudible sounds - on the contrary, you can hear them. Admittedly, when the device is in the ground, these sounds rather quiet. But we did it anyway disturbed: Saturday afternoon, one located in the garden with a good book, softly rustling the leaves, otherwise can not hear anything ... and then every ten seconds a "möööööp". Quiet but audible - we found it annoying.
For us a reason that thing unnerved return - especially as we also could find no success in the two weeks where it was in use.
