Extend your ability to make training corrections up to 1/2 of a mile with the compact 280C. E-collars allow the handler to make instantaneous corrections without requiring the dog to be on leash. The Dogtra 280C has been extensively put to the test in our own training and is a favorite when a slim compact receiver is desired or for dogs as small as 10 pounds. As with any training tool don’t forget to be firm, fair, and consistent.