In contrast to conventional clickers, the volume & pitch on the Clix Multi-Clicker can be adjusted. The principle is simple: “ Programme” your dog to the acoustic click-tone signal – look for an appropriate volume for your dog. This signal tone method has one great advantage over other educational appliances: You can get along without the use of punishment. Neither screaming & cursing, nor violence are needed. Absolutely no aggression is communicated from master to dog at all. Also suitable for cats & horses! With training instructions.