Electronic collars, often referred to as e-collars or shock collars, are devices used in dog training that deliver a mild electric stimulation to the pet's neck. They are designed to reinforce commands or discourage unwanted behaviors by providing immediate feedback. Many models offer various settings, including tone, vibration, and static stimulation, allowing trainers to choose the most appropriate level for their dog. These collars are typically used in conjunction with training techniques and can be effective for teaching commands, improving recall, or managing behavioral issues. However, their use is sometimes controversial, with concerns about potential misuse and the impact on a dog's well-being. Proper training and understanding of the device are essential for effective and humane use.