Garmin PRO Trashbreaker Handheld Top-mounted selection dial is for Lights, Tone, and Stimulation Levels (1-6) -Use toggle switch AND(front colored buttons to train multiple dogs.Toggle switch and 3 front buttons are color coordinated to correspond to each dogs collar Ability to control up to 9 dogs with a 4 mile range Includes - PRO Trashbreaker handheld, AC adapter, manual