Note: Training sound may be heard by the human ear.
I bought 2 of these several years ago for use on my 2 couches to keep dogs and cats off of the furniture. They work extremely well! would highly recommend. Also, a friend uses to put on the roof of her convertible car when she is visiting to keep the cats off of her black soft top (fur really sticks to the soft top!) and it works great for that, too.