I have purchased 3 of these mats, different company's. And this is my favorite!. Not only is the size perfect, it omits the sound and has 3 levels of intensity. And it doesn't go through 9 volt batteries like my one other one does (60 x 12) it flashes therefore takes up the life of the battery. This one does not, it only is if there is contact! I love it! I use it on top of my dryer when not in use, because my one cat wants to use the lint door as a spot, that she should be using in her litter b...