Barktec Ultimate Outdoor Ultrasonic Anti-bark Silencer

The units are well made and easy to use. They work on our Huntaway dog but our German shepherd just looks at it with a puzzled look and keeps on barking. We have had to buy a shock collar for her to stop her from barking. (which is the one thing that we were trying to avoid by buying these).

Unit works well, is easy to use and the dog hates it so much he just goes inside instead of sitting at the gate harassing passers-by. Ideal outcome!

So far so good - still watching to see how it is going