Doggie Royale  Ultimate Dog Training Kit  Dog Clicker and Ultrasonic Dog Whistle Combo  How to Train Your Pet To Stop Barking Great all-in-one pet training kit that includes a dog clicker and dog whistle You can begin teaching your dog new tricks using this dog training combo The ultrasonic dog whistle will not harm your dogs ears or hearing (it ranges in different frequencies) You will be amazed at your dog's obedience after you have started learning how to train your dog. You can teach them how to lay, stop barking, bark on command, crawl, roll over, sit etc... the possibilities are endless. This obedience training kit is not only for dogs, it can be used to train other pets as well (ex. parrots)