Tthe training clicker is a small plastic box with a metal tongue that makes a distinctive sound when pressed. These handy clickers are used by trainers for training and obedience worldwide.
When used it makes a clear sound for different commands. Once the dog has reponded correctly to a command such as "sit, heel, down or come" press the clicker once and reward your pet with a treat.Repeating this excercise quickly teaches your dog that his response to a command has been correct. 

• Clicker.
• Approximate size: 5 x 4cm.