Top positive review
It works for dogs; for cats, I don't know yet -- it also seems to annoy some pet owners
October 13, 2015
I bought it to deter the neighbor's cats and some other, unidentified, animal that left a big turd next to the iris patch. These animals come out, or are let out, at night so I have no way of knowing if it works. However, it works wonderfully on that same neighbor's three dogs. They avoid the area covered by the beam, which means they stopped barking on my side of their house. I hope it lasts!
UPDATE (July 18, 2016): ... AND THEN THE POLICE CAME... They came yesterday, asking if I had an electronic device that would sound like an explosion, like a fourth-of-July firework. Of course I did not, and I said so. Then my son reminded me of that little black box: apparently, it had been reported to the police, with some exaggeration, presumably by my neighbor' s cats and dogs, when I moved it next to the fence after noticing that an animal had jumped over the fence and landed in a flower bed
Before that, I had used the device all over the garden: next to the hole in the fence that the rabbit uses to come in; next to newly-planted areas to protect emerging bean and pea seedlings from birds, etc. I do not know how effective it is because pests and pets usually visit gardens at night; but it sure annoyed at least one pet owner. By the way, the police confirmed that this device is not illegal in any way and that I do not need a permit to use it.
SECOND UPDATE (August 9, 2017) -- ... AND NOW THE LAWYERS. This year the cat-and-dog lady next door hired a lawyer who wrote a very polite letter asking me to "immediately cease & desist" from using this "Halloween motion-sensor device that emits a loud screech whenever the wind blows" -- never mind that the sound is about as loud as a cricket chirp, and is produced only when
someone walks past the device. I would add that thanks to this device (and three others) the neighbor's cats seem to avoid my garden. So, yes, IT WORKS.
THIRD UPDATE (May 24, 2018) -- ... AND NOW THE POLICE AGAIN. I own two of these devices, one bought in 2017, the other probably in late 2015 or in 2016. They still work perfectly and the batteries seem to last a long time. I took them out last month to keep the local rabbit from eating my podded peas. I probably pressed the sound button inadvertently because they both beeped. No big deal: the beep is not even as loud as the birds chirping at the feeders. Nevertheless, the cat-lady next door (actually a cat-and-dog lady) called the police again. So, I turned the sound off -- which, of course does not mean that "my" rabbit and "her" cats won't be inconvenienced. As I wrote before, it seems to work to repel the rabbit and, probably, the neighbor's cat(s); its main appeal, however, is that it considerably disturbs cat owners -- worth the money. Note: the policeman did not dispute that the birds were louder than the PestAway but, he said, the township is not concerned with birds. (The real reason for all this nonsense is that my neighbor has three dogs which can bark for hours on end, with other dogs nearby feeling that they have to answer. Whenever someone complains to the police, she thinks I am the one who did it. It is not me though; my philosophy is always to "let someone else complain" -- and usually someone does, then I get a visit from the police or a letter from her lawyer. Well, it can't be helped!)
FOURTH UPDATE --July 12, 2018 - These devices work so well for me that I bought a third one of this kind. I now have spent a total of $247 on devices like these just to keep the neighbor's cats away from my garden* (setting out bait is illegal, of course, but probably less expensive -- consider it if you have "that kind" of a neighbor). The police department is no longer involved; they unloaded the customer on the Canton Township Ordinance Department: in his first e-mail, the ordinance inspector (one of several) stated: "I can testify that during that period,** your "Pest Away" devices were activated several times resulting in a high-pitched noise which can be a disturbance for surrounding residences". No indication of what activated the "devices" (note the plural); I guess he kept his eyes closed so he could hear better.
* I was successful in part only because the neighbor in question "scaled down" from four cats to only one or two (unless she keeps more at home).
** i.e. the 10-15 minutes during which he was sitting in his car, at the curb, about 80-85 away from the nearest Pest Away device, the other two being on the other side of the house, audible sound turned off.
August 1st, 2018 -- I had to turn the audible sound off on order of the Canton Township's Ordinance Department, but that is only temporary as someone in the police department is about to "begin an internal investigation" of my "concerns" (my main "concern" being that I was given a violation by their inspector just out of spite because I pointed out to him that he was "prepared to testify" to something that was not true).
For the moment, I use these devices (I have three PestAway) to protect my tomatoes: I think it was an oppossum that took a bite out of a low-hanging tomato a couple of weeks ago. With the PestAway (set to "ultrasound") in strategic locations this has not occurred again. The ultrasound seems to work, although I would say the audible sound may work better on cats. For rabbits? I don't know, but I spread blood meal around the pole beans and the bottom flowers were not eaten (blood meal, however, had to be replaced after every rain).
My question: will it work on birds? I gave a hard-pruning to my blueberry bushes last fall so no berries this year. Birds do not seem interested in raspberries; no problem there then. But next year my new red, black, and white currant bushes should start producing. I expect to get more than enough berries so I could share but, still, if I want to keep the birds away I will have to use the audible sound. Will it work? I will let you know next year.