Features: Dog bells for potty training can be the perfect way to toilet train pet. Instead of barking and scratching your furniture, the attention of your dogs can be turned to the bell and belt. Easily mounted, it can be hung at any level to accommodate pups of all heights. Made from heavy duty nylon, it can withstand the pull and bite of large-sized dogs. Adjustable length, you can adjust the rope length according to the height of dogs and doorknobs within a range of 31-33in.