BAODATUI Dog Whistle to Stop Barking - Barking Control Ultrasonic Patrol Sound Repellent Repeller - Adjustable Pitch in Black Color with Free Premium Quality Lanyard Strap EASY TRAINING - Dog whistle provide an harmless option to train your dog and build a greater communication with it. AMAZING BARK CONTROL - Dog whistles are very popular to train your dog without hurting your pet through shocks and other means.After your dog is trained, just one blow of this whistle will completely and instantly stop them from barking. ADJUSTABLE PITCH - Dogs can't hear all frequencies, but you can adjust the pitch for corresponding frequency to fit your dog the best. The sound will not annoyed you and who is around you, it is an ultra-sonic sound that is fit dogs well. FREE LANYARD STRAP - You never have to worry about misplacing or losing your dog whistle thanks to our free top-quality Lanyard Strap. STAINLESS STEEL MATERIAL & PERFECT SIZE - Our dog whistle designed reasonable small size and made of premium stainless steel material, convenient to have it and long lifespan.