The ET-302 Mini Educator is the 2-Dog version of the ET-300, and like it's 1-Dog counterpart, the ET-302 employs proprietary "blunt" stimulation making it the most humane and effective e-collar dog trainer available. Loaded with unique features, including "lock and set" stimulation levels from 1 to 100, and the ability to set a boost level from 1 to 60, independently for each dog, the ET-302 allows the user to tailor the stimulation to each dog's temperament. The night tracking light can be set to flashing or solid which is especially convenient in the ET-302 2-Dog system. Proudly assembled in the USA.