An E-Collar is a remote dog training system that usually consists of a wireless remote and a wireless receiver. The remote has different functions based on your model that will send either a tone, vibration, or a stimulating sensation to the dog. There is a button for a tone so the dog will respond to the tone instead of stimulus. There is also a button and a dial to apply stimulus at any level from 0 to 100. Unlike most traditional "shock collars" our E-Collars use a form of stimulus that targets the neck muscles of the dog-mimicking the loving touch of their mother. The choice is clear: If you want to have a happy pet without applying too much stimulus, then an E-Collar Remote Dog Trainer is the choice for you!