GODCRYSTAL Bark Control Device, Upgraded Mini Bark Control Device Outdoor Anti Barking Ultrasonic Dog Bark Control Sonic Bark Deterrents Silencer Stop Barking Anti Barking Device

Not nearly powerful enough for outdoors. Mounted on my house 2 feet from neighbors dogs at their ear level. It did nothingStill barking all night long, batteries are good, and I can hear it on setting number one. It needs a volume control, and more power.A better speaker would help too. Waste of money.

This product was supposed to stop the dogs from barking, they barked even more when it was on. Did not work inside or out and a waste of money. I have Chihuahuas which like to bark at everything and they were not fazed but this at all.

Didn’t work well at all for neighbor’s dog, even when placed directly on the other side of the fence at different levels.

All I can say is that it works. Neighbors german Shepard dog would bark all night. Neightbors were unwilling to do anything and I did not want to wage war. Got this and it solved the problem for me.