Does exactly what it says it does.
The anti barking device worked like a miracle . My dog , a jack Russel , is very yappy and I was constantly apologising for the background barking when on the phone, as I was working from home . The anti barking device worked instantly to stop the barking, however I don’t leave it on all the time as my dog is noise sensitive . I just put it on when my dog is barking then she stops and I switch the device off . The device is helping to correct the behaviour . I have now given the device to my partner for him to try with his dog and I have ordered another one .
Wasn’t 100% sure of the sound output i.e. Ultrasound. But downloaded an App for my android phone which measures the Ultrasound output. Now happy that it functions. And my Husky isn’t barking as much when I am out for a while so I am very happy with my purchase.