Ganlikon Dog Whistle to Stop Barking, Adjustable Pitch Ultrasonic Training Tool Silent Bark Control Easy To Use And Train Your Dog:Adjustable frequencies,Easily teach your dog unlimited commands such as sit, come, stop barking, stay, and more. Safe Dog Whistle:Will NOT hurt your dogs ears.Use Silent Bark Control for dogs stoping useless barking. Reliable recall Let your dog come to you, no matter which room in the house at the time, will not disturb other family members. It also applies to the outdoors when the dog has deviated a distance or may be out of sight. As long as you adjust the frequency in advance, your dog does not have to yell Quality Made:Designed reasonable small size & comes in premium metal black color,Long lasting and rust proof. Warranty: 100% money back guarantee!If you aren't completely satisfied with your whistle, just contact us and return it, and we will make a replacement or refund the FULL amount