Pennyy Anti Barking Device Stop Dog Barking Ultrasonic 3 in 1 Stop Bark Handheld with LED Flashlight for Small Medium and Large Dogs

Great product - trained my dog in one day

Worked three times to get dog to quit barking in the house. After that he just ignored it! Waste of batteries... going to try on cats when outside maybe they aren't as bullheaded...

After purchasing this and doing research (that I should have done before), even if you can't hear the frequency it is still possible to damage your auditory hair cells. Bought it to use in a house with a baby - not going to risk it.

Useless. It has no effect on the dog. I wasted the money on the product and even more on batteries for nothing.

It was not put together correctly and came in pieces. Unable to put back together. Waste of money!

Does not work. My dogs just looked at me and wagged their tales.

Does not work

Did not work