Easy to Train & Use Quickly - 95% success rate * Reinforced bells which are extra smooth, snapped & looped safely into place so that they won"t be pulled or fall off, heavy duty designer durable grosgrain ribbon, strategically placed for small and large breeds. * No more whining, barking or waiting by the door! An intelligent, proven and highly effective training choice. * Recommended by professional trainers. Training Instructions Included with Your Order * Portable, no batteries, wires, etc.