Dogtra 1900SDogtra committed over 20 years crafting dog training e collars to perfect the precise fit and finish, intuitive design, and accountable performance. The Dogtra 1900S e collar is durable, dependable, and designed for the most demanding conditions making it the ultimate dog training tool. This high output e collar is the unit of choice for serious amateurs and award winning professional trainers in pet obedience, hunting, competition trials, and K 9.