The PRO Trashbreaker is the simple and effective way to train your dog to stop chasing the wrong game. The tried and true tube-shaped design is easy to operate (and master) 1-handed so you can keep your eyes on your dog at all times, even while switching between stimulation and between dogs. The stimulation level/tone/LED selection dial is at the top of the handheld unit, allowing intuitive operation. And the multi-dog toggle switch and the color-coded transmitter buttons comfortably line up in the hand for fingertip control. A 5-inch removable antenna with enhanced performance delivers up to a 4-mile range.