A set of animal training clickers in different colors for dogs, puppies, cats and other animals. They are also suitable for older dogs. There are many tutorial videos online. . Size: 7cm x 6cm x 1.7cm. This clicker training for dogs is small and very light. They are comfortable to hold and easy to click. . Very easy to use. Simply give the dog a command, for example, sit/come/stay, and when the dog does, immediately click the clicker, then treat or praise the dog. . They don't need battery, just click the button, then they make a loud clicking noise which will attract pet's attention. This is a very effective training tool for dog training. . Each clicker has a stretchy elastic wristband with a lobster clasp, you can use it as a wristband or attach the belt. .