Ultrasonic Dog Trainer Deterrent AD 100 Stop Barking

We compare two dog training / deterrent devices, both labeled as AD-100. One has a very different sound than the other. (I use a "bat detector" to convert the ultrasonic waves into the human audible spectrum).
A bit of background music, made with MS Songsmith and then played on the Roland BK-3.
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Видео Ultrasonic Dog Trainer Deterrent AD 100 Stop Barking канала Paul D.