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Microphone hears dog barking - gives off ultrasonic noise that dogs don't like (doesn't hurt dog). Can be used indoors/outdoors. Bark Stop has a special sound selector that lets you choose two different frequencies: Ultrasonic frequencies and Sonic Frequency. In Ultrasonic frequency it can only be heard by dogs not humans. Bark Stop uses an old age principle called "Negative Reinforcement" by using sound to help train dogs. Help stop that annoying bark.
Customer Review: Bark Stop Pro Works with Big Dogs
We have large dogs who are so sweet but end up barking at noisy neighbors with children playing in the field behind our home and a neighbor next to us who is always complaining about our dogs barking so we decided the best thing would be to buy a bark curbing device. We ordered the Bark Stop Pro and almost immediately our dogs stopped barking. We were so tired of trying to get them to stop the nuisance barking and we love our dogs so we're very thankful that this device works. You have to use the high frequency for the big dogs. We would recommend this product to anyone who has a large barking dog.
Customer Review: Bark stop ... NOT
It appears that the Viatek product (Bark Stop Pro) is related to the Lentek design (PC16 ; ASIN: B0002Q89O6) - they are based on a common design by a Lentek engineer. I have used (tried) the Viatek Bark Stop Pro and it definitely DOES NOT work. My experience was the same as another reviewer of the Lentek PC16 who noted that the unit only works on the "Audible" setting - dogs will at least perk up their ears at the high pitch tone ; they completely ignore whatever is emitted on the "Ultrasonic" setting. Furthermore, it is often activated by extraneous noises like birds, banging doors, wind noise, etc. This really poor functionality is due to either poor design or poor construction / quality. I've tried two different units and they both do NOT work. The negative reenforcement concept could work if only these devices were tuned to the noise environment and could filter out all except the actual barks.


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