Tri-Tronics Dog Training Collars is the largest product line we carry out of all our manufacturers. All of these collars are very dependable and efficient; ensuring that training your dog will be an easy task to accomplish. As a developer of over 40 years Tri-Tronics dog training collars are definitely back by a lot of experience. One of the main focuses for Tri-Tronics is making sure that their products are simple and effective while still giving you multiple levels of control while using their dog training collars.