Surprisingly, this device works. From the latter, recently in a neighboring garden where no one lives, a neighbor's dog drove the cat up a tree. Dog ran around the tree, barked, and did not let him come down from the tree. The cat climbed onto a tree branch
and was afraid to move. Since this garden is located behind a mesh fence, it is not so easy to get there. I took the dog repeller and with the help of it drove the dog away from the tree. The cat came down from the tree and I think it was very grateful to
me). I also have a wrought-iron gate through which a small dog can crawl. A neighbor's little dog got into the habit of running around my yard and garden. Several times I scared it off with this device and the dog never came to me again.
It also has a flashlight, sometimes I also use it. It is not very bright, but it can illuminate the trail I am walking on.
Yes, it also works on cats. The cats stopped going to the toilet in my garden).