An easier and better way to communicate with dogs, the dog training bell is one of the simple and non-confrontational solutions for the toilet train family's best friendYou can break in and teach them how to signal you when they must go, using a dog bell has proven to be an easier, fun and win-win way for your dog to communicate instead of barking.3-LEVEL ADJUSTABLE LENGTH - Compared to normal two-length bells, this upgraded design gives you 3-step length adjustmentThis allows easy adjustment of the length of the door or the bottom of the wall based on the size or height of your dog, small, medium, large and large dogs love our dog bellsPREMIUM BELL AND DURABLE - The large thick wall jingle bell is made of durable metal. The elegant design of the bells' silver coating keeps them sparkling. The jingle is easily heard in the ears of the playful dogThe waist belt is custom made from heavy duty nylon material and thoroughly tested for its sturdiness. Our bell is the loudest metal dog doorbell on the market today, loud and clear every time and lasts longer than other cheaply manufactured alternatives Dog Toys