pointless gimmick

Well, there is not much to say. I have bought 2 of the devices, that when I Place in the hope in 2 Gege opposite corners of a small land area, the neighboring cats are no longer on k *****. A camera I had not this where the cat 30 cm has done her business before the beeping device. For but a photo of another cat before the device that it does not have one bit disturbed :(

My ears hurt, but when I am in the field or generally hear the noise coming from the unit.
At least the birds are not so driven, but also a star.

And one more thing: The manufacturer could at least make a little more effort and also describe the settings of the device in the user guide, not only how to insert the batteries that get 99.9% of people without back.

Conclusion: Disappointing, even if it did not cost too much