AMAZING BARK CONTROL - High frequency dog training whistle is a useful tool to control dogs excessive barking. Dog whistles are very popular to train your dog without hurting your pet through shocks and other means. Its ultrasonic sound is effective to stop barking and also harmless for dogs. When you blow your dog whistle, your dog would immediately stop barking after training. ADJUSTABLE PITCH - An Adjustable pitch frequency whistle is a great way to teach your dog new commands. Dogs can't hear all frequencies, but the ultrasonic dog whistle is adjustable to fine tune the proper frequency to get your pet dog to respond. The sound will not annoyed you and who is around you, it is an ultra-sonic sound that is fit dogs well. EASY TRAINING - -take control of your dog : train your dog to follow instruction, sit, come, stop barking, stay and more. Impact discipline and personally control your dog by issuing sequences that only he/she understand, regardless of their age, gender or breed. Enjoy complete training freedom with Poodles, Border Collies, Sheep, Gun Dogs, German Shepherds, Bulldogs, Terriers, Rottweilers, Dachshunds, Huskies, Hunti Quantity: 1pc Note:Manual measurement, there may be 1-2cm/1-3g error, which is not a quality problem. Due to different screen displays, there may be a color difference between the real object and the picture, and the main picture shall prevail.