An E-Collar, or electronic collar, is a training device used primarily for dogs. It typically consists of a collar with a small receiver that can deliver various types of stimulation, such as vibrations or mild electric shocks, to the pet. The purpose of the E-Collar is to reinforce commands and correct unwanted behaviors, making it a popular tool among dog trainers and pet owners. E-Collars can be used in various training scenarios, including obedience training and recall exercises. They are adjustable, allowing the user to control the level of stimulation based on the dog's temperament and training needs. Proper use and training are essential to ensure the well-being of the animal and to achieve effective results.