Sometimes dogs (and their handlers) need just a little extra help, and the Dogtra Electronic Training Collar does just that. The Dogtra E-collar is trusted by professionals for shaping basic obedience in companion dogs. It features the training modes of nick, constant and the non-stimulating pager vibration—which is much like the vibrate feature on cellular phones—allowing you to send a signal to your dog when he needs to correct his behavior. And with 1 to 100 levels of low to mid simulation, you can precisely control the level using the front-facing intensity dial. As always, we recommend working with a professional!