Features: 1.Made of high quality metal, solid and durable. 2.Comes with a chain, it can be hung your keychain as a decoration. 3.With this training whistle, you can better control excessive barking and manage your dog's behavior,keep your dog mannered in all public spaces. 4.Improved training deterrent, can be adjusted to a variety of frequencies so you can easily teach commands such as sit, come, stop barking, and many more. 5.Command dog with this whistle, save yourself from shouting or running to stop your dog's impolite action. Specifications: Material: Metal Color: Silver Total whistle length: 12.5cm/4.92in Chain length: 22cm/8.66in Package List: 1* Dog Training Silent Whistle 1Made of high quality metal, solid and durable. 2Comes with a chain, it can be hung your keychain as a decoration. 3With this training whistle, you can better control excessive barking and manage your dog's behavior, keep your dog mannered in all public spaces. 4Improved training deterrent, can be adjusted to a variety of frequencies so you can easily teach commands such as sit, come, stop barking, and many more. 5Command dog with this whistle, save yourself from shouting or running to stop your dog's impolite action.