One free quality Dog training clicker set provided with training guide manual An Easier, Better Way for your dog to communicate!! Instead of hearing barking & scratching, you hear the gentle jingle of Zacro Bells! All dogs have to go doorbells and you can housebreak and teach them how to signal you when they have to go!! What's better than hearing the polite chime of our Zacro Bells when your doggie needs to use the bathroom? Adjustable door bell length for small, medium and large Dogs Hang strong Zacro Bells from Any Doorknob or Handle. Our high quality doggies doorbell comes with a snap that makes it easy to use on any type of door handle! Small dogs, medium dogs, big dogs and large dogs all love our dog bells! Nylon Adjustable doorbell strap & 7pcs 1.4" Extra Loud stainless stell Bells. Don't worry your dog won't have an accident because you couldn't hear the bells when they rang them. Zacro Bells are the loudest metal dog doorbells available on the market today and ring loud and clear every time!