Htronics Mini Outdoor Sonic Dog Bark Control Devices Ultrasonic Training Dog Stop Barking Limiter Anti-Bark for Hanging or Mounting

Seems to have some effect. I wish wish it was more immediate .

Works well, takes a day for the dogs to get "trained". I feel the battery life span is too short... 9 Volt batts are expensive.

This needed to be placed on the fence where my dog barks, but after we did that it worked beautifully. Barking problem has been solved almost immediately. Also affects the neighbor's dog who barks at our dog. If necessary, we'll buy more to cover more area.

Works good. Kept the dog next door from barking like crazy.But I killed it by leaving it out in the rain. It fell over and the insides for wet... Miss it.I dig it the most.

These things do NOT work at all. I could not detect any difference between when it was off and when it was on. I want a refund.

Did not work at all!, I wasted my money.

Has not decreased my dogs barking whatsoever.

The first day we received this product it worked somewhat but after that it didn't do anything. We have 2 dogs and we tried all settings and placing closer to their height and nothing, no response whatsoever. I wish I could get a refund but I'm past the date. Don't waste your money there are better products out there that dog the same thing.