This application may be used to teach the dog to stop barking.
When he barks Barkie responds with an ultrasound only audible to the dog and makes the dog think it is unpleasant to bark.
At each bark the dog hears this sound and stops barking.
There are two different ultrasonic settings and a third sound that is audible to humans, to regulate limits for activation. The level can be set to four different values.
Test sound and one ultrasound can also be manually activated.